merge with default
authorPierre-Yves David <pierre-yves.david@logilab.fr>
Wed, 10 Oct 2012 15:11:31 +0200
changeset 578 02f34904305f
parent 573 5a0a01c4c7c2 (current diff)
parent 577 2cd2ee20d9fa (diff)
child 579 f6063ef211fd
merge with default
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/edit-is-rewrite-step1.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,509 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="773.15637"
+   height="740.48505"
+   id="svg3404"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="edit-is-rewrite-step1.svg">
+  <defs
+     id="defs3406">
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotL"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotL"
+       style="overflow:visible">
+      <path
+         id="path6390"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.8,0,0,0.8,5.92,0.8)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mstart"
+       style="overflow:visible">
+      <path
+         id="path6334"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Mstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Mstart"
+       style="overflow:visible">
+      <path
+         id="path6352"
+         style="font-size:12px;fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="scale(0.6,0.6)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path6331"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective3411" />
+    <inkscape:perspective
+       id="perspective5699"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective5753"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective5784"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.57"
+     inkscape:cx="215.04832"
+     inkscape:cy="422.53048"
+     inkscape:document-units="px"
+     showgrid="false"
+     inkscape:snap-global="true"
+     inkscape:window-width="1280"
+     inkscape:window-height="776"
+     inkscape:window-x="0"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="g6029"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5"
+     fit-margin-left="5">
+    <inkscape:grid
+       type="xygrid"
+       id="grid6315"
+       empspacing="5"
+       visible="true"
+       enabled="true"
+       snapvisiblegridlinesonly="true"
+       originx="5.0135572px"
+       originy="4.9994442px" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata3409">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:groupmode="layer"
+     id="layer4"
+     inkscape:label="babar"
+     transform="translate(12.275017,-145.05915)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot5626"
+       style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans;-inkscape-font-specification:Bitstream Vera Sans"><flowRegion
+         id="flowRegion5628"><rect
+           id="rect5630"
+           width="120.20815"
+           height="52.527931"
+           x="153.54318"
+           y="706.89001"
+           style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Bitstream Vera Sans;-inkscape-font-specification:Bitstream Vera Sans" /></flowRegion><flowPara
+         id="flowPara5636" /></flowRoot>    <flowRoot
+       xml:space="preserve"
+       id="flowRoot5653"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"><flowRegion
+         id="flowRegion5655"><rect
+           id="rect5657"
+           width="145"
+           height="49.285713"
+           x="565.71429"
+           y="683.07648" /></flowRegion><flowPara
+         id="flowPara5659" /></flowRoot>    <g
+       id="g10759"
+       transform="translate(582.45614,-14.035088)">
+      <g
+         transform="translate(-422.06809,-8.1395349)"
+         id="g6029">
+        <rect
+           style="fill:#ffffff;stroke:#000000;stroke-width:4.09652519;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="rect3414"
+           width="291.61774"
+           height="107.33205"
+           x="68.11969"
+           y="793.33905" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+           x="75.714279"
+           y="835.2193"
+           id="text5643"><tspan
+             sodipodi:role="line"
+             id="tspan5645"
+             x="75.714279"
+             y="835.2193"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">&quot;;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan5889">Alice</tspan>;Babar&quot;</tspan><tspan
+             sodipodi:role="line"
+             x="75.714279"
+             y="885.2193"
+             id="tspan5649"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">⟶ <tspan
+   id="tspan6297"
+   style="fill:#c8ab37;stroke:#c8ab37">19b08111</tspan></tspan></text>
+      </g>
+      <g
+         transform="translate(-602.95683,-59.767404)"
+         id="g6023">
+        <rect
+           style="fill:#ffffff;stroke:#000000;stroke-width:6.09169483;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="rect3414-7"
+           width="657.06445"
+           height="105.33688"
+           x="66.285065"
+           y="639.61066" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+           x="72.882072"
+           y="680.49335"
+           id="text5643-6"><tspan
+             sodipodi:role="line"
+             id="tspan5645-5"
+             x="72.882072"
+             y="680.49335"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">&quot;<tspan
+   id="tspan6203"
+   style="fill:#c8c4b7;stroke:#c8c4b7;stroke-opacity:1">19b08111</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan5885">Alice</tspan>;Babar<tspan
+   id="tspan6287"
+   style="fill:#ff0000;stroke:#ff0000">,Celeste</tspan>&quot;</tspan><tspan
+             sodipodi:role="line"
+             x="72.882072"
+             y="730.49335"
+             id="tspan5649-6"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">⟶ <tspan
+   id="tspan6035"
+   style="stroke:#009400;stroke-opacity:1"><tspan
+     id="tspan6039"
+     style="stroke:#00b500;stroke-opacity:1"><tspan
+       id="tspan6043"
+       style="stroke:#00ae00;stroke-opacity:1"><tspan
+         id="tspan6045"
+         style="stroke:#00ad00;stroke-opacity:1"><tspan
+           id="tspan6047"
+           style="stroke:#00ac00;stroke-opacity:1"><tspan
+             id="tspan6051"
+             style="stroke:#00aa00;stroke-opacity:1"><tspan
+               id="tspan6053"
+               style="stroke:#00a800;stroke-opacity:1"><tspan
+                 id="tspan6055"
+                 style="stroke:#00a600;stroke-opacity:1"><tspan
+                   id="tspan6057"
+                   style="stroke:#00a400;stroke-opacity:1"><tspan
+                     id="tspan6059"
+                     style="stroke:#00a100;stroke-opacity:1"><tspan
+                       id="tspan6061"
+                       style="stroke:#009f00;stroke-opacity:1"><tspan
+                         id="tspan6063"
+                         style="stroke:#009d00;stroke-opacity:1"><tspan
+                           id="tspan6065"
+                           style="stroke:#009900;stroke-opacity:1"><tspan
+                             id="tspan6067"
+                             style="stroke:#009800;stroke-opacity:1"><tspan
+                               id="tspan6069"
+                               style="stroke:#009700;stroke-opacity:1"><tspan
+                                 id="tspan6071"
+                                 style="stroke:#009800;stroke-opacity:1"><tspan
+                                   id="tspan6073"
+                                   style="stroke:#009900;stroke-opacity:1"><tspan
+                                   id="tspan6077"
+                                   style="stroke:#009c00;stroke-opacity:1"><tspan
+                                   id="tspan6079"
+                                   style="stroke:#009d00;stroke-opacity:1"><tspan
+                                   id="tspan6081"
+                                   style="stroke:#009e00;stroke-opacity:1"><tspan
+                                   id="tspan6083"
+                                   style="stroke:#009f00;stroke-opacity:1"><tspan
+                                   id="tspan6085"
+                                   style="stroke:#00a100;stroke-opacity:1"><tspan
+                                   id="tspan6087"
+                                   style="stroke:#00a200;stroke-opacity:1"><tspan
+                                   id="tspan6089"
+                                   style="stroke:#00a500;stroke-opacity:1"><tspan
+                                   id="tspan6091"
+                                   style="stroke:#00a600;stroke-opacity:1"><tspan
+                                   id="tspan6093"
+                                   style="stroke:#00a500;stroke-opacity:1"><tspan
+                                   id="tspan6095"
+                                   style="stroke:#00a200;stroke-opacity:1"><tspan
+                                   id="tspan6097"
+                                   style="stroke:#00a100;stroke-opacity:1"><tspan
+                                   id="tspan6099"
+                                   style="stroke:#009f00;stroke-opacity:1"><tspan
+                                   id="tspan6101"
+                                   style="stroke:#009c00;stroke-opacity:1"><tspan
+                                   id="tspan6103"
+                                   style="stroke:#009700;stroke-opacity:1"><tspan
+                                   id="tspan6105"
+                                   style="stroke:#009200;stroke-opacity:1"><tspan
+                                   id="tspan6107"
+                                   style="stroke:#008b00;stroke-opacity:1"><tspan
+                                   id="tspan6109"
+                                   style="stroke:#008500;stroke-opacity:1"><tspan
+                                   id="tspan6111"
+                                   style="stroke:#007c00;stroke-opacity:1"><tspan
+                                   id="tspan6113"
+                                   style="stroke:#007500;stroke-opacity:1"><tspan
+                                   id="tspan6115"
+                                   style="stroke:#006b00;stroke-opacity:1"><tspan
+                                   id="tspan6117"
+                                   style="stroke:#006100;stroke-opacity:1"><tspan
+                                   id="tspan6119"
+                                   style="stroke:#005800;stroke-opacity:1"><tspan
+                                   id="tspan6121"
+                                   style="stroke:#004d00;stroke-opacity:1"><tspan
+                                   id="tspan6123"
+                                   style="stroke:#004500;stroke-opacity:1"><tspan
+                                   id="tspan6125"
+                                   style="stroke:#003b00;stroke-opacity:1"><tspan
+                                   id="tspan6127"
+                                   style="stroke:#003300;stroke-opacity:1"><tspan
+                                   id="tspan6129"
+                                   style="stroke:#002900;stroke-opacity:1"><tspan
+                                   id="tspan6131"
+                                   style="stroke:#002200;stroke-opacity:1"><tspan
+                                   id="tspan6133"
+                                   style="stroke:#001900;stroke-opacity:1"><tspan
+                                   id="tspan6135"
+                                   style="stroke:#001300;stroke-opacity:1"><tspan
+                                   id="tspan6137"
+                                   style="stroke:#000b00;stroke-opacity:1"><tspan
+                                   id="tspan6139"
+                                   style="stroke:#000700;stroke-opacity:1"><tspan
+                                   id="tspan6141"
+                                   style="stroke:#000000;stroke-opacity:1"><tspan
+                                   id="tspan6145"
+                                   style="stroke:#d00000;stroke-opacity:1"><tspan
+                                   id="tspan6147"
+                                   style="stroke:#d10000;stroke-opacity:1"><tspan
+                                   id="tspan6149"
+                                   style="stroke:#d30000;stroke-opacity:1"><tspan
+                                   id="tspan6151"
+                                   style="stroke:#d80000;stroke-opacity:1"><tspan
+                                   id="tspan6153"
+                                   style="stroke:#db0000;stroke-opacity:1"><tspan
+                                   id="tspan6155"
+                                   style="stroke:#e10000;stroke-opacity:1"><tspan
+                                   id="tspan6157"
+                                   style="stroke:#e40000;stroke-opacity:1"><tspan
+                                   id="tspan6159"
+                                   style="stroke:#eb0000;stroke-opacity:1"><tspan
+                                   id="tspan6161"
+                                   style="stroke:#ef0000;stroke-opacity:1"><tspan
+                                   id="tspan6163"
+                                   style="stroke:#f50000;stroke-opacity:1"><tspan
+                                   id="tspan6165"
+                                   style="stroke:#f90000;stroke-opacity:1"><tspan
+                                   id="tspan6167"
+                                   style="stroke:#fd0000;stroke-opacity:1"><tspan
+                                   id="tspan6169"
+                                   style="stroke:#ff0000;stroke-opacity:1"><tspan
+                                   id="tspan6185"
+                                   style="fill:#010000;fill-opacity:1"><tspan
+                                   id="tspan6187"
+                                   style="fill:#4c0000;fill-opacity:1"><tspan
+                                   id="tspan6189"
+                                   style="fill:#810000;fill-opacity:1"><tspan
+                                   id="tspan6191"
+                                   style="fill:#c70000;fill-opacity:1"><tspan
+                                   id="tspan6193"
+                                   style="fill:#ee0000;fill-opacity:1"><tspan
+                                   id="tspan6195"
+                                   style="fill:#ff0000;fill-opacity:1"><tspan
+                                   id="tspan6279"
+                                   style="fill:#c8ab37"><tspan
+                                   id="tspan6281"
+                                   style="stroke:#c8ab37">925d8319          </tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></text>
+      </g>
+      <g
+         transform="translate(-582.55815,-32.55814)"
+         id="g6009">
+        <rect
+           style="fill:#ffffff;stroke:#000000;stroke-width:5.109797;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="rect3414-7-0"
+           width="458.04636"
+           height="106.31878"
+           x="145.39543"
+           y="199.2028" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+           x="152.48338"
+           y="240.57646"
+           id="text5643-6-0"><tspan
+             sodipodi:role="line"
+             x="152.48338"
+             y="240.57646"
+             id="tspan5649-6-7"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">&quot;<tspan
+   id="tspan6305"
+   style="fill:#c8c4b7;stroke:#c8c4b7">6fcdd7fe</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan5877">Bob</tspan>;Babar&quot;</tspan><tspan
+             sodipodi:role="line"
+             x="152.48338"
+             y="290.57648"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+             id="tspan5823"><tspan
+               id="tspan6309"
+               style="fill:#c8ab37;stroke:#c8ab37">⟶ebc2b5a1      </tspan></tspan><tspan
+             sodipodi:role="line"
+             x="152.48338"
+             y="340.57648"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+             id="tspan5825" /></text>
+      </g>
+      <g
+         transform="translate(-574.4186,-84.34382)"
+         id="g6016">
+        <rect
+           style="fill:#ffffff;stroke:#000000;stroke-width:6.52355862;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="rect3414-7-0-7"
+           width="756.63257"
+           height="104.90502"
+           x="-12.03722"
+           y="458.04919" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+           x="-5.6561542"
+           y="498.71597"
+           id="text5643-6-0-7"><tspan
+             sodipodi:role="line"
+             x="-5.6561542"
+             y="498.71597"
+             id="tspan5649-6-7-5"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none">&quot;<tspan
+   id="tspan6289"
+   style="fill:#c8c4b7;stroke:#c8c4b7">925d8319</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan5881">Alice</tspan>;Babar,Celeste<tspan
+   id="tspan6303"
+   style="fill:#ff0000;stroke:#ff0000">,flore</tspan>&quot;</tspan><tspan
+             sodipodi:role="line"
+             x="-5.6561542"
+             y="548.71594"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+             id="tspan5809">⟶ <tspan
+   id="tspan6299"
+   style="fill:#c8ab37;stroke:#c8ab37">6fcdd7fe                     </tspan></tspan><tspan
+             sodipodi:role="line"
+             x="-5.6561542"
+             y="598.71594"
+             style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+             id="tspan5811" /></text>
+      </g>
+      <path
+         inkscape:connection-start="#g6016"
+         inkscape:connection-end="#g6009"
+         inkscape:connector-type="polyline"
+         id="path6317"
+         d="m -208.13954,373.70537 0,-100.74193"
+         style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:url(#DotM);marker-end:none"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g6023"
+         inkscape:connection-start="#g6029"
+         inkscape:connector-type="polyline"
+         id="path6321"
+         d="m -208.13953,785.19952 -1e-5,-100.01938"
+         style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:2.79999995;stroke-opacity:1;stroke-dasharray:none;marker-start:url(#DotM);marker-end:none"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g6023"
+         inkscape:connection-start="#g6016"
+         inkscape:connector-type="polyline"
+         id="path6323"
+         d="m -208.13954,478.6104 0,101.23285"
+         style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-mid:none;marker-end:url(#DotM)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/edit-is-rewrite-step2.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,832 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1597.0645"
+   height="768.49182"
+   id="svg3404"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="edit-is-rewrite-step2.svg">
+  <defs
+     id="defs3406">
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotL"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotL"
+       style="overflow:visible">
+      <path
+         id="path6390"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.8,0,0,0.8,5.92,0.8)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mstart"
+       style="overflow:visible">
+      <path
+         id="path6334"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Mstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Mstart"
+       style="overflow:visible">
+      <path
+         id="path6352"
+         style="font-size:12px;fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="scale(0.6,0.6)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path6331"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective3411" />
+    <inkscape:perspective
+       id="perspective5699"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective5753"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective5784"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective11514"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-8"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker11520"
+       style="overflow:visible">
+      <path
+         id="path11522"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.57"
+     inkscape:cx="1091.46"
+     inkscape:cy="493.26469"
+     inkscape:document-units="px"
+     showgrid="false"
+     inkscape:snap-global="true"
+     inkscape:window-width="1280"
+     inkscape:window-height="776"
+     inkscape:window-x="0"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer4"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5"
+     fit-margin-left="5">
+    <inkscape:grid
+       type="xygrid"
+       id="grid6315"
+       empspacing="5"
+       visible="true"
+       enabled="true"
+       snapvisiblegridlinesonly="true"
+       originx="424.40857px"
+       originy="4.9994042px" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata3409">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:groupmode="layer"
+     id="layer4"
+     inkscape:label="babar"
+     transform="translate(888.68669,-124.06992)">
+    <flowRoot
+       xml:space="preserve"
+       id="flowRoot5626"
+       style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans;-inkscape-font-specification:Bitstream Vera Sans"><flowRegion
+         id="flowRegion5628"><rect
+           id="rect5630"
+           width="120.20815"
+           height="52.527931"
+           x="153.54318"
+           y="706.89001"
+           style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Bitstream Vera Sans;-inkscape-font-specification:Bitstream Vera Sans" /></flowRegion><flowPara
+         id="flowPara5636" /></flowRoot>    <flowRoot
+       xml:space="preserve"
+       id="flowRoot5653"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"><flowRegion
+         id="flowRegion5655"><rect
+           id="rect5657"
+           width="145"
+           height="49.285713"
+           x="565.71429"
+           y="683.07648" /></flowRegion><flowPara
+         id="flowPara5659" /></flowRoot>    <g
+       id="g6029"
+       transform="translate(-296.62861,-15.157079)">
+      <rect
+         y="793.33905"
+         x="68.11969"
+         height="107.33205"
+         width="291.61774"
+         id="rect3414"
+         style="fill:#ffffff;stroke:#000000;stroke-width:4.09652519000000037;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+      <text
+         id="text5643"
+         y="835.2193"
+         x="75.714279"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="835.2193"
+           x="75.714279"
+           id="tspan5645"
+           sodipodi:role="line">&quot;;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12068">Alice</tspan>;Babar&quot;</tspan><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649"
+           y="885.2193"
+           x="75.714279"
+           sodipodi:role="line">⟶ <tspan
+   style="fill:#c8ab37;stroke:#c8ab37"
+   id="tspan6297">19b08111</tspan></tspan></text>
+    </g>
+    <g
+       id="g6023"
+       transform="translate(-897.69367,-93.100738)"
+       style="opacity:0.5">
+      <rect
+         y="639.61066"
+         x="66.285065"
+         height="105.33688"
+         width="657.06445"
+         id="rect3414-7"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:20, 10;stroke-dashoffset:0" />
+      <text
+         id="text5643-6"
+         y="680.49335"
+         x="72.882072"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="680.49335"
+           x="72.882072"
+           id="tspan5645-5"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#c8c4b7;stroke:#c8c4b7;stroke-opacity:1"
+   id="tspan6203">19b08111</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12072">Alice</tspan>;Babar<tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan6287">,Celeste</tspan>&quot;</tspan><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6"
+           y="730.49335"
+           x="72.882072"
+           sodipodi:role="line">⟶ <tspan
+   style="stroke:#009400;stroke-opacity:1"
+   id="tspan6035"><tspan
+     style="stroke:#00b500;stroke-opacity:1"
+     id="tspan6039"><tspan
+       style="stroke:#00ae00;stroke-opacity:1"
+       id="tspan6043"><tspan
+         style="stroke:#00ad00;stroke-opacity:1"
+         id="tspan6045"><tspan
+           style="stroke:#00ac00;stroke-opacity:1"
+           id="tspan6047"><tspan
+             style="stroke:#00aa00;stroke-opacity:1"
+             id="tspan6051"><tspan
+               style="stroke:#00a800;stroke-opacity:1"
+               id="tspan6053"><tspan
+                 style="stroke:#00a600;stroke-opacity:1"
+                 id="tspan6055"><tspan
+                   style="stroke:#00a400;stroke-opacity:1"
+                   id="tspan6057"><tspan
+                     style="stroke:#00a100;stroke-opacity:1"
+                     id="tspan6059"><tspan
+                       style="stroke:#009f00;stroke-opacity:1"
+                       id="tspan6061"><tspan
+                         style="stroke:#009d00;stroke-opacity:1"
+                         id="tspan6063"><tspan
+                           style="stroke:#009900;stroke-opacity:1"
+                           id="tspan6065"><tspan
+                             style="stroke:#009800;stroke-opacity:1"
+                             id="tspan6067"><tspan
+                               style="stroke:#009700;stroke-opacity:1"
+                               id="tspan6069"><tspan
+                                 style="stroke:#009800;stroke-opacity:1"
+                                 id="tspan6071"><tspan
+                                   style="stroke:#009900;stroke-opacity:1"
+                                   id="tspan6073"><tspan
+                                   style="stroke:#009c00;stroke-opacity:1"
+                                   id="tspan6077"><tspan
+                                   style="stroke:#009d00;stroke-opacity:1"
+                                   id="tspan6079"><tspan
+                                   style="stroke:#009e00;stroke-opacity:1"
+                                   id="tspan6081"><tspan
+                                   style="stroke:#009f00;stroke-opacity:1"
+                                   id="tspan6083"><tspan
+                                   style="stroke:#00a100;stroke-opacity:1"
+                                   id="tspan6085"><tspan
+                                   style="stroke:#00a200;stroke-opacity:1"
+                                   id="tspan6087"><tspan
+                                   style="stroke:#00a500;stroke-opacity:1"
+                                   id="tspan6089"><tspan
+                                   style="stroke:#00a600;stroke-opacity:1"
+                                   id="tspan6091"><tspan
+                                   style="stroke:#00a500;stroke-opacity:1"
+                                   id="tspan6093"><tspan
+                                   style="stroke:#00a200;stroke-opacity:1"
+                                   id="tspan6095"><tspan
+                                   style="stroke:#00a100;stroke-opacity:1"
+                                   id="tspan6097"><tspan
+                                   style="stroke:#009f00;stroke-opacity:1"
+                                   id="tspan6099"><tspan
+                                   style="stroke:#009c00;stroke-opacity:1"
+                                   id="tspan6101"><tspan
+                                   style="stroke:#009700;stroke-opacity:1"
+                                   id="tspan6103"><tspan
+                                   style="stroke:#009200;stroke-opacity:1"
+                                   id="tspan6105"><tspan
+                                   style="stroke:#008b00;stroke-opacity:1"
+                                   id="tspan6107"><tspan
+                                   style="stroke:#008500;stroke-opacity:1"
+                                   id="tspan6109"><tspan
+                                   style="stroke:#007c00;stroke-opacity:1"
+                                   id="tspan6111"><tspan
+                                   style="stroke:#007500;stroke-opacity:1"
+                                   id="tspan6113"><tspan
+                                   style="stroke:#006b00;stroke-opacity:1"
+                                   id="tspan6115"><tspan
+                                   style="stroke:#006100;stroke-opacity:1"
+                                   id="tspan6117"><tspan
+                                   style="stroke:#005800;stroke-opacity:1"
+                                   id="tspan6119"><tspan
+                                   style="stroke:#004d00;stroke-opacity:1"
+                                   id="tspan6121"><tspan
+                                   style="stroke:#004500;stroke-opacity:1"
+                                   id="tspan6123"><tspan
+                                   style="stroke:#003b00;stroke-opacity:1"
+                                   id="tspan6125"><tspan
+                                   style="stroke:#003300;stroke-opacity:1"
+                                   id="tspan6127"><tspan
+                                   style="stroke:#002900;stroke-opacity:1"
+                                   id="tspan6129"><tspan
+                                   style="stroke:#002200;stroke-opacity:1"
+                                   id="tspan6131"><tspan
+                                   style="stroke:#001900;stroke-opacity:1"
+                                   id="tspan6133"><tspan
+                                   style="stroke:#001300;stroke-opacity:1"
+                                   id="tspan6135"><tspan
+                                   style="stroke:#000b00;stroke-opacity:1"
+                                   id="tspan6137"><tspan
+                                   style="stroke:#000700;stroke-opacity:1"
+                                   id="tspan6139"><tspan
+                                   style="stroke:#000000;stroke-opacity:1"
+                                   id="tspan6141"><tspan
+                                   style="stroke:#d00000;stroke-opacity:1"
+                                   id="tspan6145"><tspan
+                                   style="stroke:#d10000;stroke-opacity:1"
+                                   id="tspan6147"><tspan
+                                   style="stroke:#d30000;stroke-opacity:1"
+                                   id="tspan6149"><tspan
+                                   style="stroke:#d80000;stroke-opacity:1"
+                                   id="tspan6151"><tspan
+                                   style="stroke:#db0000;stroke-opacity:1"
+                                   id="tspan6153"><tspan
+                                   style="stroke:#e10000;stroke-opacity:1"
+                                   id="tspan6155"><tspan
+                                   style="stroke:#e40000;stroke-opacity:1"
+                                   id="tspan6157"><tspan
+                                   style="stroke:#eb0000;stroke-opacity:1"
+                                   id="tspan6159"><tspan
+                                   style="stroke:#ef0000;stroke-opacity:1"
+                                   id="tspan6161"><tspan
+                                   style="stroke:#f50000;stroke-opacity:1"
+                                   id="tspan6163"><tspan
+                                   style="stroke:#f90000;stroke-opacity:1"
+                                   id="tspan6165"><tspan
+                                   style="stroke:#fd0000;stroke-opacity:1"
+                                   id="tspan6167"><tspan
+                                   style="stroke:#ff0000;stroke-opacity:1"
+                                   id="tspan6169"><tspan
+                                   style="fill:#010000;fill-opacity:1"
+                                   id="tspan6185"><tspan
+                                   style="fill:#4c0000;fill-opacity:1"
+                                   id="tspan6187"><tspan
+                                   style="fill:#810000;fill-opacity:1"
+                                   id="tspan6189"><tspan
+                                   style="fill:#c70000;fill-opacity:1"
+                                   id="tspan6191"><tspan
+                                   style="fill:#ee0000;fill-opacity:1"
+                                   id="tspan6193"><tspan
+                                   style="fill:#ff0000;fill-opacity:1"
+                                   id="tspan6195"><tspan
+                                   style="fill:#c8ab37"
+                                   id="tspan6279"><tspan
+                                   style="stroke:#c8ab37"
+                                   id="tspan6281">925d8319          </tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></text>
+    </g>
+    <g
+       id="g6009"
+       transform="translate(-877.29499,-65.891474)"
+       style="opacity:0.5">
+      <rect
+         y="199.2028"
+         x="145.39543"
+         height="106.31878"
+         width="458.04636"
+         id="rect3414-7-0"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:20, 10;stroke-dashoffset:0" />
+      <text
+         id="text5643-6-0"
+         y="240.57646"
+         x="152.48338"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6-7"
+           y="240.57646"
+           x="152.48338"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#c8c4b7;stroke:#c8c4b7"
+   id="tspan6305">6fcdd7fe</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12080">Bob</tspan>;Babar&quot;</tspan><tspan
+           id="tspan5823"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="290.57648"
+           x="152.48338"
+           sodipodi:role="line"><tspan
+             style="fill:#c8ab37;stroke:#c8ab37"
+             id="tspan6309">⟶ebc2b5a1      </tspan></tspan><tspan
+           id="tspan5825"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="340.57648"
+           x="152.48338"
+           sodipodi:role="line" /></text>
+    </g>
+    <g
+       id="g6016"
+       transform="translate(-869.15544,-117.67716)"
+       style="opacity:0.5">
+      <rect
+         y="458.04919"
+         x="-12.03722"
+         height="104.90502"
+         width="756.63257"
+         id="rect3414-7-0-7"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:20, 10;stroke-dashoffset:0" />
+      <text
+         id="text5643-6-0-7"
+         y="498.71597"
+         x="-5.6561542"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6-7-5"
+           y="498.71597"
+           x="-5.6561542"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#c8c4b7;stroke:#c8c4b7"
+   id="tspan6289">925d8319</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12076">Alice</tspan>;Babar,Celeste<tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan6303">,flore<tspan
+   style="fill:#000000;stroke:#000000"
+   id="tspan6313">&quot;</tspan></tspan></tspan><tspan
+           id="tspan5809"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="548.71594"
+           x="-5.6561542"
+           sodipodi:role="line">⟶ <tspan
+   style="fill:#c8ab37;stroke:#c8ab37"
+   id="tspan6299">6fcdd7fe                     </tspan></tspan><tspan
+           id="tspan5811"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="598.71594"
+           x="-5.6561542"
+           sodipodi:role="line" /></text>
+    </g>
+    <path
+       style="opacity:0.5;fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:url(#DotM);marker-end:none"
+       d="m -502.87638,340.37203 0,-100.74192"
+       id="path6317"
+       inkscape:connector-type="polyline"
+       inkscape:connection-end="#g6009"
+       inkscape:connection-start="#g6016"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:0.5;fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:2.79999995000000013;stroke-opacity:1;stroke-dasharray:none;marker-start:url(#DotM);marker-end:none"
+       d="M -179.61512,778.18197 -407.76284,651.8468"
+       id="path6321"
+       inkscape:connector-type="polyline"
+       inkscape:connection-start="#g6029"
+       inkscape:connection-end="#g6023"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:0.5;fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-mid:none;marker-end:url(#DotM)"
+       d="m -502.87638,445.27706 0,101.23286"
+       id="path6323"
+       inkscape:connector-type="polyline"
+       inkscape:connection-end="#g6023"
+       inkscape:connection-start="#g6016"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+    <g
+       id="g6023-5"
+       transform="translate(-72.254198,-94.854246)">
+      <rect
+         y="639.61066"
+         x="66.285065"
+         height="105.33688"
+         width="657.06445"
+         id="rect3414-7-5"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+      <text
+         id="text5643-6-3"
+         y="680.49335"
+         x="72.882072"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="680.49335"
+           x="72.882072"
+           id="tspan5645-5-0"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#c8c4b7;stroke:#c8c4b7;stroke-opacity:1"
+   id="tspan6203-2">19b08111</tspan>;<tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan12040">Bob</tspan>;Babar,Celeste&quot;</tspan><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6-70"
+           y="730.49335"
+           x="72.882072"
+           sodipodi:role="line">⟶ <tspan
+   style="stroke:#009400;stroke-opacity:1"
+   id="tspan6035-4"><tspan
+     style="stroke:#00b500;stroke-opacity:1"
+     id="tspan6039-3"><tspan
+       style="stroke:#00ae00;stroke-opacity:1"
+       id="tspan6043-2"><tspan
+         style="stroke:#00ad00;stroke-opacity:1"
+         id="tspan6045-5"><tspan
+           style="stroke:#00ac00;stroke-opacity:1"
+           id="tspan6047-2"><tspan
+             style="stroke:#00aa00;stroke-opacity:1"
+             id="tspan6051-8"><tspan
+               style="stroke:#00a800;stroke-opacity:1"
+               id="tspan6053-9"><tspan
+                 style="stroke:#00a600;stroke-opacity:1"
+                 id="tspan6055-1"><tspan
+                   style="stroke:#00a400;stroke-opacity:1"
+                   id="tspan6057-7"><tspan
+                     style="stroke:#00a100;stroke-opacity:1"
+                     id="tspan6059-2"><tspan
+                       style="stroke:#009f00;stroke-opacity:1"
+                       id="tspan6061-8"><tspan
+                         style="stroke:#009d00;stroke-opacity:1"
+                         id="tspan6063-7"><tspan
+                           style="stroke:#009900;stroke-opacity:1"
+                           id="tspan6065-4"><tspan
+                             style="stroke:#009800;stroke-opacity:1"
+                             id="tspan6067-1"><tspan
+                               style="stroke:#009700;stroke-opacity:1"
+                               id="tspan6069-4"><tspan
+                                 style="stroke:#009800;stroke-opacity:1"
+                                 id="tspan6071-7"><tspan
+                                   style="stroke:#009900;stroke-opacity:1"
+                                   id="tspan6073-8"><tspan
+                                   style="stroke:#009c00;stroke-opacity:1"
+                                   id="tspan6077-6"><tspan
+                                   style="stroke:#009d00;stroke-opacity:1"
+                                   id="tspan6079-8"><tspan
+                                   style="stroke:#009e00;stroke-opacity:1"
+                                   id="tspan6081-8"><tspan
+                                   style="stroke:#009f00;stroke-opacity:1"
+                                   id="tspan6083-3"><tspan
+                                   style="stroke:#00a100;stroke-opacity:1"
+                                   id="tspan6085-6"><tspan
+                                   style="stroke:#00a200;stroke-opacity:1"
+                                   id="tspan6087-0"><tspan
+                                   style="stroke:#00a500;stroke-opacity:1"
+                                   id="tspan6089-0"><tspan
+                                   style="stroke:#00a600;stroke-opacity:1"
+                                   id="tspan6091-3"><tspan
+                                   style="stroke:#00a500;stroke-opacity:1"
+                                   id="tspan6093-6"><tspan
+                                   style="stroke:#00a200;stroke-opacity:1"
+                                   id="tspan6095-1"><tspan
+                                   style="stroke:#00a100;stroke-opacity:1"
+                                   id="tspan6097-5"><tspan
+                                   style="stroke:#009f00;stroke-opacity:1"
+                                   id="tspan6099-8"><tspan
+                                   style="stroke:#009c00;stroke-opacity:1"
+                                   id="tspan6101-8"><tspan
+                                   style="stroke:#009700;stroke-opacity:1"
+                                   id="tspan6103-6"><tspan
+                                   style="stroke:#009200;stroke-opacity:1"
+                                   id="tspan6105-2"><tspan
+                                   style="stroke:#008b00;stroke-opacity:1"
+                                   id="tspan6107-1"><tspan
+                                   style="stroke:#008500;stroke-opacity:1"
+                                   id="tspan6109-0"><tspan
+                                   style="stroke:#007c00;stroke-opacity:1"
+                                   id="tspan6111-9"><tspan
+                                   style="stroke:#007500;stroke-opacity:1"
+                                   id="tspan6113-5"><tspan
+                                   style="stroke:#006b00;stroke-opacity:1"
+                                   id="tspan6115-0"><tspan
+                                   style="stroke:#006100;stroke-opacity:1"
+                                   id="tspan6117-9"><tspan
+                                   style="stroke:#005800;stroke-opacity:1"
+                                   id="tspan6119-7"><tspan
+                                   style="stroke:#004d00;stroke-opacity:1"
+                                   id="tspan6121-7"><tspan
+                                   style="stroke:#004500;stroke-opacity:1"
+                                   id="tspan6123-3"><tspan
+                                   style="stroke:#003b00;stroke-opacity:1"
+                                   id="tspan6125-5"><tspan
+                                   style="stroke:#003300;stroke-opacity:1"
+                                   id="tspan6127-6"><tspan
+                                   style="stroke:#002900;stroke-opacity:1"
+                                   id="tspan6129-8"><tspan
+                                   style="stroke:#002200;stroke-opacity:1"
+                                   id="tspan6131-6"><tspan
+                                   style="stroke:#001900;stroke-opacity:1"
+                                   id="tspan6133-2"><tspan
+                                   style="stroke:#001300;stroke-opacity:1"
+                                   id="tspan6135-7"><tspan
+                                   style="stroke:#000b00;stroke-opacity:1"
+                                   id="tspan6137-6"><tspan
+                                   style="stroke:#000700;stroke-opacity:1"
+                                   id="tspan6139-8"><tspan
+                                   style="stroke:#000000;stroke-opacity:1"
+                                   id="tspan6141-5"><tspan
+                                   style="stroke:#d00000;stroke-opacity:1"
+                                   id="tspan6145-5"><tspan
+                                   style="stroke:#d10000;stroke-opacity:1"
+                                   id="tspan6147-1"><tspan
+                                   style="stroke:#d30000;stroke-opacity:1"
+                                   id="tspan6149-3"><tspan
+                                   style="stroke:#d80000;stroke-opacity:1"
+                                   id="tspan6151-7"><tspan
+                                   style="stroke:#db0000;stroke-opacity:1"
+                                   id="tspan6153-2"><tspan
+                                   style="stroke:#e10000;stroke-opacity:1"
+                                   id="tspan6155-6"><tspan
+                                   style="stroke:#e40000;stroke-opacity:1"
+                                   id="tspan6157-3"><tspan
+                                   style="stroke:#eb0000;stroke-opacity:1"
+                                   id="tspan6159-5"><tspan
+                                   style="stroke:#ef0000;stroke-opacity:1"
+                                   id="tspan6161-3"><tspan
+                                   style="stroke:#f50000;stroke-opacity:1"
+                                   id="tspan6163-3"><tspan
+                                   style="stroke:#f90000;stroke-opacity:1"
+                                   id="tspan6165-5"><tspan
+                                   style="stroke:#fd0000;stroke-opacity:1"
+                                   id="tspan6167-1"><tspan
+                                   style="stroke:#ff0000;stroke-opacity:1"
+                                   id="tspan6169-8"><tspan
+                                   style="fill:#010000;fill-opacity:1"
+                                   id="tspan6185-8"><tspan
+                                   style="fill:#4c0000;fill-opacity:1"
+                                   id="tspan6187-3"><tspan
+                                   style="fill:#810000;fill-opacity:1"
+                                   id="tspan6189-7"><tspan
+                                   style="fill:#c70000;fill-opacity:1"
+                                   id="tspan6191-5"><tspan
+                                   style="fill:#ee0000;fill-opacity:1"
+                                   id="tspan6193-3"><tspan
+                                   style="fill:#ff0000;fill-opacity:1"
+                                   id="tspan6195-6"><tspan
+                                   style="fill:#c8ab37"
+                                   id="tspan6279-2"><tspan
+                                   style="stroke:#c8ab37"
+                                   id="tspan6281-0">1a25964c          </tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></tspan></text>
+    </g>
+    <g
+       id="g6009-2"
+       transform="matrix(1.0149773,0,0,1,-61.013248,-67.644986)">
+      <rect
+         y="199.28004"
+         x="136.82903"
+         height="106.1643"
+         width="487.27863"
+         id="rect3414-7-0-9"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5.15333318999999968;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+      <text
+         id="text5643-6-0-8"
+         y="240.57646"
+         x="152.48338"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6-7-0"
+           y="240.57646"
+           x="152.48338"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan6305-8">6d9e1549</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12088">Bob</tspan>;Babar&quot;</tspan><tspan
+           id="tspan5823-0"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="290.57648"
+           x="152.48338"
+           sodipodi:role="line"><tspan
+             style="fill:#c8ab37;stroke:#c8ab37"
+             id="tspan6309-7"><tspan
+               style="fill:#000000;stroke:#000000"
+               id="tspan12060">⟶<tspan
+   style="fill:#c8ab37"
+   id="tspan12064"><tspan
+     style="stroke:#c8ab37"
+     id="tspan12066">dda72e36      </tspan></tspan></tspan></tspan></tspan><tspan
+           id="tspan5825-4"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="340.57648"
+           x="152.48338"
+           sodipodi:role="line" /></text>
+    </g>
+    <g
+       id="g6016-0"
+       transform="translate(-43.715968,-119.43067)">
+      <rect
+         y="458.04919"
+         x="-12.03722"
+         height="104.90502"
+         width="756.63257"
+         id="rect3414-7-0-7-4"
+         style="fill:#ffffff;stroke:#000000;stroke-width:5;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+      <text
+         id="text5643-6-0-7-1"
+         y="498.71597"
+         x="-5.6561542"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           id="tspan5649-6-7-5-4"
+           y="498.71597"
+           x="-5.6561542"
+           sodipodi:role="line">&quot;<tspan
+   style="fill:#c8c4b7;stroke:#c8c4b7"
+   id="tspan12056">1a25964c</tspan>;<tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan12084">Alice</tspan>;Babar,Celeste,<tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan12050">F</tspan>lore&quot;</tspan><tspan
+           id="tspan5809-3"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="548.71594"
+           x="-5.6561542"
+           sodipodi:role="line">⟶ <tspan
+   style="fill:#c8ab37;stroke:#c8ab37"
+   id="tspan6299-4">6d9e1549                     </tspan></tspan><tspan
+           id="tspan5811-3"
+           style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none"
+           y="598.71594"
+           x="-5.6561542"
+           sodipodi:role="line" /></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:url(#DotM);marker-end:none"
+       d="m 323.22154,338.61852 1.26559,-100.81916"
+       id="path6317-8"
+       inkscape:connector-type="polyline"
+       inkscape:connection-end="#g6009-2"
+       inkscape:connection-start="#g6016-0"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-mid:none;marker-end:url(#DotM)"
+       d="m 322.5631,443.52355 -1e-5,101.23286"
+       id="path6323-8"
+       inkscape:connector-type="polyline"
+       inkscape:connection-start="#g6016-0"
+       inkscape:connection-end="#g6023-5"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:4;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#marker11520)"
+       d="M 231.51159,650.09329 10.076033,778.18197"
+       id="path11833"
+       inkscape:connector-type="polyline"
+       inkscape:connection-start="#g6023-5"
+       inkscape:connection-end="#g6029"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end-point="d4"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-concurrent-10-solution.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,929 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1290.3188"
+   height="561.80957"
+   id="svg12094"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="explain-troubles-concurrent-10-solution.svg">
+  <defs
+     id="defs12096">
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path4197"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMstart"
+       style="overflow:visible">
+      <path
+         id="path4188"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotS"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotS"
+       style="overflow:visible">
+      <path
+         id="path6396"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.2,0,0,0.2,1.48,0.2)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12102" />
+    <pattern
+       patternUnits="userSpaceOnUse"
+       width="165"
+       height="162.14285"
+       patternTransform="matrix(0.60606061,0,0,0.61674011,-218.21429,419.14788)"
+       id="pattern12110">
+      <rect
+         ry="78.664986"
+         y="2.4064403"
+         x="2.4064403"
+         height="157.32997"
+         width="160.18712"
+         id="rect12108"
+         style="opacity:0.75;fill:#008000;fill-opacity:0;fill-rule:nonzero;stroke:#008000;stroke-width:4.81288052;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" />
+    </pattern>
+    <inkscape:perspective
+       id="perspective12641"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12674"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12705"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12705-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12811"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12838"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12869"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective12869-3"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective8199"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective8230"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6393-0"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3407"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3409"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3411"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3413"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3415"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3417"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-9"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4197-6"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3421"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3423"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-15"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6393-08"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3824"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3826"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3828"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3830"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3832"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3834"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-7"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4197-67"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker3838"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path3840"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.7"
+     inkscape:cx="746.41279"
+     inkscape:cy="248.41683"
+     inkscape:document-units="px"
+     inkscape:current-layer="g3367-2"
+     showgrid="false"
+     inkscape:window-width="1215"
+     inkscape:window-height="776"
+     inkscape:window-x="65"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     fit-margin-left="5"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata12099">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(1002.1836,-116.82843)">
+    <flowRoot
+       transform="translate(-214.28571,111.42857)"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       id="flowRoot12902"
+       xml:space="preserve"><flowRegion
+         id="flowRegion12904"><rect
+           y="320.93362"
+           x="-924.28571"
+           height="435.71429"
+           width="301.42856"
+           id="rect12906" /></flowRegion><flowPara
+         id="flowPara12908" /></flowRoot>    <g
+       id="g3367">
+      <g
+         style="opacity:0.5"
+         id="g8425">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,151.88146)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-822.54358"
+           y="362.2431"
+           id="text12629-9-3-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0"
+             x="-822.54358"
+             y="362.2431">B</tspan></text>
+      </g>
+      <g
+         id="g10287">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-821.49023"
+           y="498.90979"
+           id="text12629-9-3-1-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7"
+             x="-821.49023"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(-10.776028,0)"
+         id="g12957">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <path
+         inkscape:connector-type="polyline"
+         id="path12950"
+         d="m -808.27602,393.39505 0,42.40522"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957"
+         inkscape:connector-type="polyline"
+         id="path12962"
+         d="m -808.27602,532.73368 0,39.73323"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         style="fill:#0000ff;stroke:#0000ff"
+         id="g8286">
+        <path
+           sodipodi:type="arc"
+           style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-612.86713,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#0000ff;font-family:Bitstream Vera Sans"
+           x="-684.68646"
+           y="272.78107"
+           id="text12629-9-3-1-4"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76"
+             x="-684.68646"
+             y="272.78107">B'</tspan></text>
+      </g>
+      <g
+         style="fill:#008000;stroke:#008000"
+         id="g8294">
+        <path
+           sodipodi:type="arc"
+           style="fill:#008000;fill-opacity:0;fill-rule:evenodd;stroke:#008000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-888.58143,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#008000;fill-opacity:1;stroke:#008000;font-family:Bitstream Vera Sans"
+           x="-960.40076"
+           y="272.78107"
+           id="text12629-9-3-1-4-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-6"
+             x="-960.40076"
+             y="272.78107">B''</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g10287"
+         inkscape:connection-start="#g8286"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8303"
+         d="M 301.69976,93.326264 214.85234,235.78314"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g10287"
+         inkscape:connection-start="#g8294"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8305"
+         d="M 76.995186,93.326264 163.84261,235.78314"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425"
+         inkscape:connection-start="#g8286"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8430"
+         d="M 286.10442,78.162204 230.44767,114.28051"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425"
+         inkscape:connection-start="#g8294"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8432"
+         d="M 92.590525,78.162204 148.24727,114.28051"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+    <g
+       id="g3367-2"
+       transform="translate(902.50523,0.6852693)">
+      <g
+         style="opacity:0.5"
+         id="g8425-2">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-64"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,151.88146)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-822.54358"
+           y="362.2431"
+           id="text12629-9-3-1-6"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-1"
+             x="-822.54358"
+             y="362.2431">B</tspan></text>
+      </g>
+      <g
+         id="g10287-0">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-821.49023"
+           y="498.90979"
+           id="text12629-9-3-1-8-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-9"
+             x="-821.49023"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(-10.776028,0)"
+         id="g12957-1">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-0"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <path
+         inkscape:connector-type="polyline"
+         id="path12950-6"
+         d="m -808.27602,393.39505 0,42.40522"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957-1"
+         inkscape:connector-type="polyline"
+         id="path12962-4"
+         d="m -808.27602,532.73368 0,39.73323"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         style="opacity:0.5;fill:#0000ff;stroke:#0000ff"
+         id="g8286-9">
+        <path
+           sodipodi:type="arc"
+           style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-612.86713,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#0000ff;font-family:Bitstream Vera Sans"
+           x="-684.68646"
+           y="272.78107"
+           id="text12629-9-3-1-4-0"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-0"
+             x="-684.68646"
+             y="272.78107">B'</tspan></text>
+      </g>
+      <g
+         style="opacity:0.5;fill:#008000;stroke:#008000"
+         id="g8294-9">
+        <path
+           sodipodi:type="arc"
+           style="fill:#008000;fill-opacity:0;fill-rule:evenodd;stroke:#008000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-2-8"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-888.58143,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#008000;fill-opacity:1;stroke:#008000;font-family:Bitstream Vera Sans"
+           x="-960.40076"
+           y="272.78107"
+           id="text12629-9-3-1-4-8-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-6-0"
+             x="-960.40076"
+             y="272.78107">B''</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g10287-0"
+         inkscape:connection-start="#g8286-9"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8303-7"
+         d="M 301.69976,93.326264 214.85234,235.78314"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g10287-0"
+         inkscape:connection-start="#g8294-9"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8305-3"
+         d="M 76.995186,93.326264 163.84261,235.78314"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425-2"
+         inkscape:connection-start="#g8286-9"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8430-0"
+         d="M 286.10442,78.162204 230.44767,114.28051"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425-2"
+         inkscape:connection-start="#g8294-9"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8432-1"
+         d="M 92.590525,78.162204 148.24727,114.28051"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+         d="m 1045.7143,-14.223969 -54.28573,30"
+         id="path5991"
+         inkscape:connector-curvature="0"
+         transform="translate(-1900.1287,205.96263)" />
+      <path
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+         d="M 1141.4286,-4.2239685 1185.7143,24.34746"
+         id="path5993"
+         inkscape:connector-curvature="0"
+         transform="translate(-1900.1287,205.96263)" />
+      <path
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#marker3832)"
+         d="m 1068.5714,11.490317 -62.8571,88.571433 70,132.85714"
+         id="path5995"
+         inkscape:connector-curvature="0"
+         transform="translate(-1900.1287,205.96263)" />
+    </g>
+    <g
+       id="g5033">
+      <path
+         transform="matrix(0.33294398,0,0,0.48990327,-283.50522,302.96994)"
+         d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+         sodipodi:ry="100"
+         sodipodi:rx="147.14285"
+         sodipodi:cy="399.50504"
+         sodipodi:cx="-172.85715"
+         id="path12627-8-4-1-3"
+         style="opacity:0.5;fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+         sodipodi:type="arc" />
+      <text
+         id="text12629-9-3-1-0"
+         y="513.3316"
+         x="-355.32452"
+         style="font-size:40px;font-style:normal;font-weight:normal;opacity:0.5;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="513.3316"
+           x="-355.32452"
+           id="tspan12631-6-9-0-8"
+           sodipodi:role="line">B</tspan></text>
+    </g>
+    <g
+       id="g5028">
+      <path
+         transform="matrix(0.33294398,0,0,0.48990327,-146.5298,215.57827)"
+         d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+         sodipodi:ry="100"
+         sodipodi:rx="147.14285"
+         sodipodi:cy="399.50504"
+         sodipodi:cx="-172.85715"
+         id="path12627-8-4-1-5-1"
+         style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+         sodipodi:type="arc" />
+      <text
+         id="text12629-9-3-1-4-9"
+         y="425.93994"
+         x="-218.34914"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#0000ff;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="425.93994"
+           x="-218.34914"
+           id="tspan12631-6-9-0-76-8"
+           sodipodi:role="line">B'</tspan></text>
+    </g>
+    <g
+       id="g5023">
+      <path
+         transform="matrix(0.33294398,0,0,0.48990327,-422.14656,215.91205)"
+         d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+         sodipodi:ry="100"
+         sodipodi:rx="147.14285"
+         sodipodi:cy="399.50504"
+         sodipodi:cx="-172.85715"
+         id="path12627-8-4-1-5-2-4"
+         style="fill:#008000;fill-opacity:0;fill-rule:evenodd;stroke:#008000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+         sodipodi:type="arc" />
+      <text
+         id="text12629-9-3-1-4-8-3"
+         y="426.27371"
+         x="-493.96588"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#008000;fill-opacity:1;stroke:#008000;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="426.27371"
+           x="-493.96588"
+           id="tspan12631-6-9-0-76-6-4"
+           sodipodi:role="line">B''</tspan></text>
+    </g>
+    <g
+       id="g5018">
+      <path
+         transform="matrix(0.33294398,0,0,0.48990327,-285.48057,130.5673)"
+         d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+         sodipodi:ry="100"
+         sodipodi:rx="147.14285"
+         sodipodi:cy="399.50504"
+         sodipodi:cx="-172.85715"
+         id="path12627-8-4-1-5-1-4"
+         style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#007d7d;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+         sodipodi:type="arc" />
+      <text
+         id="text12629-9-3-1-4-9-5"
+         y="340.92896"
+         x="-357.2999"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#007d7d;stroke-opacity:1;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="340.92896"
+           x="-357.2999"
+           id="tspan12631-6-9-0-76-8-9"
+           sodipodi:role="line"
+           style="fill:#007d7d;fill-opacity:1">B*</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+       d="m 696.38676,145.20902 55.35962,33.86937"
+       id="path5038"
+       inkscape:connector-type="polyline"
+       inkscape:connector-curvature="3"
+       inkscape:connection-start="#g5018"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end="#g5028"
+       inkscape:connection-end-point="d4"
+       transform="translate(-997.6235,206.6479)" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+       d="m 613.03214,145.59088 -53.54791,33.43943"
+       id="path5040"
+       inkscape:connector-type="polyline"
+       inkscape:connector-curvature="3"
+       inkscape:connection-start="#g5018"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end="#g5023"
+       inkscape:connection-end-point="d4"
+       transform="translate(-997.6235,206.6479)" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+       d="m 559.41952,231.03876 55.65269,34.94632"
+       id="path5042"
+       inkscape:connector-type="polyline"
+       inkscape:connector-curvature="3"
+       inkscape:connection-start="#g5023"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end="#g5033"
+       inkscape:connection-end-point="d4"
+       transform="translate(-997.6235,206.6479)" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker3838)"
+       d="M 752.23638,231.00256 697.87211,265.6875"
+       id="path5044"
+       inkscape:connector-type="polyline"
+       inkscape:connector-curvature="3"
+       inkscape:connection-start="#g5028"
+       inkscape:connection-start-point="d4"
+       inkscape:connection-end="#g5033"
+       inkscape:connection-end-point="d4"
+       transform="translate(-997.6235,206.6479)" />
+    <g
+       transform="translate(441.1231,-152.43362)"
+       id="g5018-9">
+      <path
+         transform="matrix(0.33294398,0,0,0.48990327,-285.48057,130.5673)"
+         d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+         sodipodi:ry="100"
+         sodipodi:rx="147.14285"
+         sodipodi:cy="399.50504"
+         sodipodi:cx="-172.85715"
+         id="path12627-8-4-1-5-1-4-7"
+         style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#007d7d;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+         sodipodi:type="arc" />
+      <text
+         id="text12629-9-3-1-4-9-5-1"
+         y="340.92896"
+         x="-357.2999"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#007d7d;stroke-opacity:1;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="340.92896"
+           x="-357.2999"
+           id="tspan12631-6-9-0-76-8-9-4"
+           sodipodi:role="line"
+           style="fill:#007d7d;fill-opacity:1">B*</tspan></text>
+    </g>
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-concurrent-10-sumup.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,1451 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1424.2434"
+   height="1058.7501"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="explain-troubles-concurrent-10-sumup.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path4078"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path4072"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.8,0,0,0.8,10,0)" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18500"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-4"
+       style="overflow:visible">
+      <path
+         id="path6393-20"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18588"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-47"
+       style="overflow:visible">
+      <path
+         id="path6393-22"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18594"
+       style="overflow:visible">
+      <path
+         id="path18596"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-31"
+       style="overflow:visible">
+      <path
+         id="path4197"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18791"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective18959"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-6"
+       style="overflow:visible">
+      <path
+         id="path6393-21"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18965"
+       style="overflow:visible">
+      <path
+         id="path18967"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1-4"
+       style="overflow:visible">
+      <path
+         id="path6393-3"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-2"
+       style="overflow:visible">
+      <path
+         id="path4197-2"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective19288"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-44"
+       style="overflow:visible">
+      <path
+         id="path6393-9"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker19294"
+       style="overflow:visible">
+      <path
+         id="path19296"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective20729"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-8"
+       style="overflow:visible">
+      <path
+         id="path6393-7"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker20735"
+       style="overflow:visible">
+      <path
+         id="path20737"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective20952"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-42"
+       style="overflow:visible">
+      <path
+         id="path6393-0"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker20958"
+       style="overflow:visible">
+      <path
+         id="path20960"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker20962"
+       style="overflow:visible">
+      <path
+         id="path20964"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-8"
+       style="overflow:visible">
+      <path
+         id="path4197-7"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective21100"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-22"
+       style="overflow:visible">
+      <path
+         id="path6393-8"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21106"
+       style="overflow:visible">
+      <path
+         id="path21108"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21110"
+       style="overflow:visible">
+      <path
+         id="path21112"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-313"
+       style="overflow:visible">
+      <path
+         id="path4197-6"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective21316"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-3"
+       style="overflow:visible">
+      <path
+         id="path6393-80"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21322"
+       style="overflow:visible">
+      <path
+         id="path21324"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21326"
+       style="overflow:visible">
+      <path
+         id="path21328"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21330"
+       style="overflow:visible">
+      <path
+         id="path21332"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-6"
+       style="overflow:visible">
+      <path
+         id="path4197-66"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker21336"
+       style="overflow:visible">
+      <path
+         id="path21338"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.58"
+     inkscape:cx="455.19061"
+     inkscape:cy="725.32431"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1280"
+     inkscape:window-height="776"
+     inkscape:window-x="0"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(312.26788,374.46262)">
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="290.07355"
+       y="683.72107"
+       id="text13894"><tspan
+         sodipodi:role="line"
+         id="tspan13896"
+         x="290.07355"
+         y="683.72107">Local</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="176.47943"
+       y="147.90836"
+       id="text13898"><tspan
+         sodipodi:role="line"
+         id="tspan13900"
+         x="176.47943"
+         y="147.90836">Distant</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="731.52625"
+       y="360.52893"
+       id="text13902"><tspan
+         sodipodi:role="line"
+         id="tspan13904"
+         x="731.52625"
+         y="360.52893">final = <tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan14035">divergent</tspan></tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -149.51243,71.715908 116.10904,-98.285798"
+       id="path14093" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -136.88118,173.93586 140.19146,310.32109"
+       id="path14093-1" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="m 358.73418,-10.742763 276.5932,40.995518"
+       id="path14093-4"
+       inkscape:transform-center-x="38.2665"
+       inkscape:transform-center-y="-14.191534" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M 385.49434,405.82501 666.42726,306.55019"
+       id="path14093-42" />
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="-316.03741"
+       y="327.08148"
+       id="text13894-3"><tspan
+         sodipodi:role="line"
+         id="tspan13896-8"
+         x="-316.03741"
+         y="327.08148">initial</tspan></text>
+    <g
+       transform="translate(536.95625,-391.35879)"
+       id="g20705">
+      <g
+         transform="translate(0,5.2380981)"
+         id="g12933-0">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-98"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-811.76758"
+           y="357.005"
+           id="text12629-9-3-1-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-3"
+             x="-811.76758"
+             y="357.005">B</tspan></text>
+      </g>
+      <g
+         id="g12945">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         id="g12957">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g12945"
+         inkscape:connection-start="#g12933-0"
+         inkscape:connector-type="polyline"
+         id="path12950-93"
+         d="m -797.5,393.91867 0,41.35798"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957"
+         inkscape:connection-start="#g12945"
+         inkscape:connector-type="polyline"
+         id="path12962"
+         d="m -797.5,533.2573 0,38.68599"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+    <g
+       transform="translate(1065.0106,-10.420874)"
+       id="g20918">
+      <g
+         style="opacity:0.5"
+         id="g8425">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-91"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,151.88146)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-822.54358"
+           y="362.2431"
+           id="text12629-9-3-1-3"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-8"
+             x="-822.54358"
+             y="362.2431">B</tspan></text>
+      </g>
+      <g
+         id="g10287">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-821.49023"
+           y="498.90979"
+           id="text12629-9-3-1-8-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-6"
+             x="-821.49023"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(-10.776028,0)"
+         id="g12957-7">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-4"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-9"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904"><rect
+             id="rect12906"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908" /></flowRoot>      <path
+         inkscape:connector-type="polyline"
+         id="path12950-6"
+         d="m -808.27602,393.39505 0,42.40522"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957-7"
+         inkscape:connector-type="polyline"
+         id="path12962-1"
+         d="m -808.27602,532.73368 0,39.73323"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         style="fill:#0000ff;stroke:#0000ff"
+         id="g8286">
+        <path
+           sodipodi:type="arc"
+           style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-612.86713,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#0000ff;font-family:Bitstream Vera Sans"
+           x="-684.68646"
+           y="272.78107"
+           id="text12629-9-3-1-4"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-6"
+             x="-684.68646"
+             y="272.78107">B'</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g10287"
+         inkscape:connection-start="#g8286"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8303"
+         d="M 301.69976,93.326264 214.85234,235.78314"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425"
+         inkscape:connection-start="#g8286"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8430"
+         d="M 286.10442,78.162204 230.44767,114.28051"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+    <g
+       transform="translate(1068.385,-581.11052)"
+       id="g21066">
+      <g
+         style="opacity:0.5"
+         id="g8425-4">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-50"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,151.88146)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-822.54358"
+           y="362.2431"
+           id="text12629-9-3-1-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-9"
+             x="-822.54358"
+             y="362.2431">B</tspan></text>
+      </g>
+      <g
+         id="g10287-2">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-5"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-821.49023"
+           y="498.90979"
+           id="text12629-9-3-1-8-7"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-9"
+             x="-821.49023"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(-10.776028,0)"
+         id="g12957-71">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-47"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-0"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-66"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902-9"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904-70"><rect
+             id="rect12906-8"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908-61" /></flowRoot>      <path
+         inkscape:connector-type="polyline"
+         id="path12950-7"
+         d="m -808.27602,393.39505 0,42.40522"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957-71"
+         inkscape:connector-type="polyline"
+         id="path12962-3"
+         d="m -808.27602,532.73368 0,39.73323"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         style="fill:#008000;stroke:#008000"
+         id="g8294">
+        <path
+           sodipodi:type="arc"
+           style="fill:#008000;fill-opacity:0;fill-rule:evenodd;stroke:#008000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-888.58143,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#008000;fill-opacity:1;stroke:#008000;font-family:Bitstream Vera Sans"
+           x="-960.40076"
+           y="272.78107"
+           id="text12629-9-3-1-4-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-6-5"
+             x="-960.40076"
+             y="272.78107">B''</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g10287-2"
+         inkscape:connection-start="#g8294"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8305"
+         d="M 76.995186,93.326264 163.84261,235.78314"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425-4"
+         inkscape:connection-start="#g8294"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8432"
+         d="M 92.590525,78.162204 148.24727,114.28051"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+    <g
+       transform="translate(1682.2151,-370.76569)"
+       id="g21276">
+      <g
+         style="opacity:0.5"
+         id="g8425-1">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,151.88146)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-822.54358"
+           y="362.2431"
+           id="text12629-9-3-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0"
+             x="-822.54358"
+             y="362.2431">B</tspan></text>
+      </g>
+      <g
+         id="g10287-7">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-750.72428,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-821.49023"
+           y="498.90979"
+           id="text12629-9-3-1-8-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-1"
+             x="-821.49023"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(-10.776028,0)"
+         id="g12957-9">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-0"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-3"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-6"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902-3"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904-7"><rect
+             id="rect12906-6"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908-5" /></flowRoot>      <path
+         inkscape:connector-type="polyline"
+         id="path12950"
+         d="m -808.27602,393.39505 0,42.40522"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957-9"
+         inkscape:connector-type="polyline"
+         id="path12962-5"
+         d="m -808.27602,532.73368 0,39.73323"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         style="fill:#ff0000;stroke:#ff0000"
+         id="g8286-2">
+        <path
+           sodipodi:type="arc"
+           style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-612.86713,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+           x="-684.68646"
+           y="272.78107"
+           id="text12629-9-3-1-4-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76"
+             x="-684.68646"
+             y="272.78107">B'</tspan></text>
+      </g>
+      <g
+         style="fill:#ff0000;stroke:#ff0000"
+         id="g8294-2">
+        <path
+           sodipodi:type="arc"
+           style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-2-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-888.58143,62.419408)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+           x="-960.40076"
+           y="272.78107"
+           id="text12629-9-3-1-4-8-3"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-76-6-59"
+             x="-960.40076"
+             y="272.78107">B''</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g10287-7"
+         inkscape:connection-start="#g8286-2"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8303-8"
+         d="M 301.69976,93.326264 214.85234,235.78314"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g10287-7"
+         inkscape:connection-start="#g8294-2"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8305-0"
+         d="M 76.995186,93.326264 163.84261,235.78314"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM);display:inline"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425-1"
+         inkscape:connection-start="#g8286-2"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8430-0"
+         d="M 286.10442,78.162204 230.44767,114.28051"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g8425-1"
+         inkscape:connection-start="#g8294-2"
+         inkscape:connector-type="polyline"
+         transform="translate(-997.6235,206.6479)"
+         id="path8432-1"
+         d="M 92.590525,78.162204 148.24727,114.28051"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+    </g>
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-latecomer-10-sumup.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,1039 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1311.8625"
+   height="879.2406"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.47 r22583"
+   sodipodi:docname="explain-troubles-latecomer-10-sumup.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path4078"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path4072"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.8,0,0,0.8,10,0)" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18500"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-4"
+       style="overflow:visible">
+      <path
+         id="path6393-20"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18588"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-47"
+       style="overflow:visible">
+      <path
+         id="path6393-22"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18594"
+       style="overflow:visible">
+      <path
+         id="path18596"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-31"
+       style="overflow:visible">
+      <path
+         id="path4197"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18791"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective18959"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-6"
+       style="overflow:visible">
+      <path
+         id="path6393-21"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18965"
+       style="overflow:visible">
+      <path
+         id="path18967"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1-4"
+       style="overflow:visible">
+      <path
+         id="path6393-3"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-2"
+       style="overflow:visible">
+      <path
+         id="path4197-2"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective19288"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-44"
+       style="overflow:visible">
+      <path
+         id="path6393-9"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker19294"
+       style="overflow:visible">
+      <path
+         id="path19296"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.58"
+     inkscape:cx="455.19061"
+     inkscape:cy="630.49672"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1918"
+     inkscape:window-height="1165"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(312.26788,289.78072)">
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="279.72873"
+       y="588.89349"
+       id="text13894"><tspan
+         sodipodi:role="line"
+         id="tspan13896"
+         x="279.72873"
+         y="588.89349">Local</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="176.47943"
+       y="147.90836"
+       id="text13898"><tspan
+         sodipodi:role="line"
+         id="tspan13900"
+         x="176.47943"
+         y="147.90836">Distant</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="731.52625"
+       y="360.52893"
+       id="text13902"><tspan
+         sodipodi:role="line"
+         id="tspan13904"
+         x="731.52625"
+         y="360.52893">final = <tspan
+   style="fill:#ff0000;stroke:#ff0000"
+   id="tspan14035">tardif</tspan></tspan></text>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -149.51243,71.715908 116.10904,-98.285798"
+       id="path14093" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -136.88118,173.93586 140.19146,310.32109"
+       id="path14093-1" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="m 358.73418,-10.742763 276.5932,40.995518"
+       id="path14093-4"
+       inkscape:transform-center-x="38.2665"
+       inkscape:transform-center-y="-14.191534" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M 385.49434,405.82501 666.42726,306.55019"
+       id="path14093-42" />
+    <g
+       transform="translate(536.84443,-411.12056)"
+       id="g18477">
+      <g
+         id="g12945">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         id="g12957">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904"><rect
+             id="rect12906"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908" /></flowRoot>      <path
+         inkscape:connection-end="#g12957"
+         inkscape:connection-start="#g12945"
+         inkscape:connector-type="polyline"
+         id="path12962"
+         d="m -797.5,533.2573 0,38.68599"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+    </g>
+    <g
+       transform="translate(1048.9196,-141.60299)"
+       id="g18559">
+      <g
+         style="opacity:0.5"
+         id="g12945-6">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-5"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-9"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         id="g12957-33">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-80"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-0"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902-9"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904-8"><rect
+             id="rect12906-6"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908-3" /></flowRoot>      <path
+         inkscape:connection-end="#g12957-33"
+         inkscape:connection-start="#g12945-6"
+         inkscape:connector-type="polyline"
+         id="path12962-09"
+         d="m -797.5,533.2573 0,38.68599"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <g
+         id="g3273">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-598.58143,208.13369)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-669.34741"
+           y="418.49533"
+           id="text12629-9-3-1-8-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7-4"
+             x="-669.34741"
+             y="418.49533">A'</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g12957-33"
+         inkscape:connection-start="#g3273"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,352.36219)"
+         id="path3278"
+         d="M 166.11979,92.547868 78.227679,227.51388"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connection-end="#g12945-6"
+         inkscape:connection-start="#g3273"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,352.36219)"
+         id="path3280"
+         d="M 150.2668,75.717222 94.08067,107.67788"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+       x="-316.03741"
+       y="327.08148"
+       id="text13894-3"><tspan
+         sodipodi:role="line"
+         id="tspan13896-8"
+         x="-316.03741"
+         y="327.08148">initial</tspan></text>
+    <g
+       transform="translate(1607.395,-370.37344)"
+       id="g18925">
+      <g
+         transform="translate(0,5.2380981)"
+         id="g12933">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#d4aa00;fill-opacity:1;stroke:#d4aa00;font-family:Bitstream Vera Sans"
+           x="-841.76758"
+           y="358.43356"
+           id="text12629-9-3-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0"
+             x="-841.76758"
+             y="358.43356">v4.2</tspan></text>
+      </g>
+      <g
+         id="g12945-7">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8-25"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-1"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         id="g12957-38">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-8"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-6"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902-3"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904-7"><rect
+             id="rect12906-4"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908-6" /></flowRoot>      <path
+         inkscape:connection-start="#g12933"
+         inkscape:connection-end="#g12945-7"
+         inkscape:connector-type="polyline"
+         id="path12950"
+         d="m -797.5,393.91867 0,41.35798"
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connection-end="#g12957-38"
+         inkscape:connection-start="#g12945-7"
+         inkscape:connector-type="polyline"
+         id="path12962-2"
+         d="m -797.5,533.2573 0,38.68599"
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <g
+         id="g7062">
+        <path
+           sodipodi:type="arc"
+           style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-4-1"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-601.73896,221.4909)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+           x="-672.50494"
+           y="431.85254"
+           id="text12629-9-3-1-8-2-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7"
+             x="-672.50494"
+             y="431.85254">A'</tspan></text>
+      </g>
+      <path
+         inkscape:connection-end="#g12957-38"
+         inkscape:connection-start="#g7062"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,296.10995)"
+         id="path7067"
+         d="M 162.19312,161.64503 78.99682,284.27841"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM-1)" />
+      <path
+         inkscape:connection-end="#g12945-7"
+         inkscape:connection-start="#g7062"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,296.10995)"
+         id="path7069"
+         d="M 145.61323,142.48988 95.576703,166.76692"
+         style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)" />
+    </g>
+    <g
+       transform="translate(1040.2927,-585.89067)"
+       id="g19264">
+      <g
+         id="g12933-2"
+         transform="translate(0,5.2380981)">
+        <path
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           sodipodi:ry="100"
+           sodipodi:rx="147.14285"
+           sodipodi:cy="399.50504"
+           sodipodi:cx="-172.85715"
+           id="path12627-8-4-1-3"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           sodipodi:type="arc" />
+        <text
+           id="text12629-9-3-1-80"
+           y="358.43356"
+           x="-841.76758"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#d4aa00;fill-opacity:1;stroke:#d4aa00;font-family:Bitstream Vera Sans"
+           xml:space="preserve"><tspan
+             y="358.43356"
+             x="-841.76758"
+             id="tspan12631-6-9-0-76"
+             sodipodi:role="line">v4.2</tspan></text>
+      </g>
+      <g
+         id="g12945-76">
+        <path
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           sodipodi:ry="100"
+           sodipodi:rx="147.14285"
+           sodipodi:cy="399.50504"
+           sodipodi:cx="-172.85715"
+           id="path12627-8-4-1-9-29"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           sodipodi:type="arc" />
+        <text
+           id="text12629-9-3-1-8-9"
+           y="498.90979"
+           x="-810.71423"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           xml:space="preserve"><tspan
+             y="498.90979"
+             x="-810.71423"
+             id="tspan12631-6-9-0-7-0"
+             sodipodi:role="line">A</tspan></text>
+      </g>
+      <g
+         id="g12957-39">
+        <path
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           sodipodi:ry="100"
+           sodipodi:rx="147.14285"
+           sodipodi:cy="399.50504"
+           sodipodi:cx="-172.85715"
+           id="path12627-8-4-1-6-81"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           sodipodi:type="arc" />
+        <text
+           id="text12629-9-3-1-83-7"
+           y="635.57648"
+           x="-810.71423"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           xml:space="preserve"><tspan
+             y="635.57648"
+             x="-810.71423"
+             id="tspan12631-6-9-0-5-08"
+             sodipodi:role="line">Z</tspan></text>
+      </g>
+      <path
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         d="m -797.5,393.91867 0,41.35798"
+         id="path12950-9"
+         inkscape:connector-type="polyline"
+         inkscape:connection-end="#g12945-76"
+         inkscape:connection-start="#g12933-2" />
+      <path
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         d="m -797.5,533.2573 0,38.68599"
+         id="path12962-0"
+         inkscape:connector-type="polyline"
+         inkscape:connection-start="#g12945-76"
+         inkscape:connection-end="#g12957-39" />
+    </g>
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-latecomer-15-solution.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,994 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="557.31696"
+   height="487.83316"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="explain-troubles-latecomer-15-solution.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path4078"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path4072"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.8,0,0,0.8,10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18500"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-4"
+       style="overflow:visible">
+      <path
+         id="path6393-20"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18588"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-47"
+       style="overflow:visible">
+      <path
+         id="path6393-22"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18594"
+       style="overflow:visible">
+      <path
+         id="path18596"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-31"
+       style="overflow:visible">
+      <path
+         id="path4197"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective18791"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <inkscape:perspective
+       id="perspective18959"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-6"
+       style="overflow:visible">
+      <path
+         id="path6393-21"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker18965"
+       style="overflow:visible">
+      <path
+         id="path18967"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1-4"
+       style="overflow:visible">
+      <path
+         id="path6393-3"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-2"
+       style="overflow:visible">
+      <path
+         id="path4197-2"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective19288"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-44"
+       style="overflow:visible">
+      <path
+         id="path6393-9"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker19294"
+       style="overflow:visible">
+      <path
+         id="path19296"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-7"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6393-6"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker6176"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6178"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1-7"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6393-1-6"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-8"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6456-0"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.58"
+     inkscape:cx="588.77184"
+     inkscape:cy="64.133389"
+     inkscape:document-units="px"
+     inkscape:current-layer="g7062-0"
+     showgrid="false"
+     inkscape:window-width="1215"
+     inkscape:window-height="776"
+     inkscape:window-x="65"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-left="5"
+     fit-margin-bottom="5" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(170.29334,188.87454)">
+    <g
+       id="g6078">
+      <g
+         id="g18925"
+         transform="translate(683.25707,-378.99413)">
+        <g
+           id="g12933"
+           transform="translate(0,5.2380981)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1"
+             style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1"
+             y="358.43356"
+             x="-841.76758"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#d4aa00;fill-opacity:1;stroke:#d4aa00;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="358.43356"
+               x="-841.76758"
+               id="tspan12631-6-9-0"
+               sodipodi:role="line">v4.2</tspan></text>
+        </g>
+        <g
+           id="g12945-7">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-2"
+             style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-25"
+             y="498.90979"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="498.90979"
+               x="-810.71423"
+               id="tspan12631-6-9-0-7-1"
+               sodipodi:role="line">A</tspan></text>
+        </g>
+        <g
+           id="g12957-38">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-6-4"
+             style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-83-8"
+             y="635.57648"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="635.57648"
+               x="-810.71423"
+               id="tspan12631-6-9-0-5-6"
+               sodipodi:role="line">Z</tspan></text>
+        </g>
+        <flowRoot
+           transform="translate(-214.28571,111.42857)"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           id="flowRoot12902-3"
+           xml:space="preserve"><flowRegion
+             id="flowRegion12904-7"><rect
+               y="320.93362"
+               x="-924.28571"
+               height="435.71429"
+               width="301.42856"
+               id="rect12906-4" /></flowRegion><flowPara
+             id="flowPara12908-6" /></flowRoot>        <path
+           inkscape:connector-curvature="0"
+           inkscape:connection-end-point="d4"
+           inkscape:connection-start-point="d4"
+           style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -797.5,393.91867 0,41.35798"
+           id="path12950"
+           inkscape:connector-type="polyline"
+           inkscape:connection-end="#g12945-7"
+           inkscape:connection-start="#g12933" />
+        <path
+           inkscape:connector-curvature="0"
+           inkscape:connection-end-point="d4"
+           inkscape:connection-start-point="d4"
+           style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -797.5,533.2573 0,38.68599"
+           id="path12962-2"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12945-7"
+           inkscape:connection-end="#g12957-38" />
+        <g
+           id="g7062">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-601.73896,221.4909)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-4-1"
+             style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-2-2"
+             y="431.85254"
+             x="-672.50494"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="431.85254"
+               x="-672.50494"
+               id="tspan12631-6-9-0-7-7"
+               sodipodi:role="line">A'</tspan></text>
+        </g>
+        <path
+           inkscape:connector-curvature="0"
+           inkscape:connection-end-point="d4"
+           inkscape:connection-start-point="d4"
+           style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM-1)"
+           d="M 162.19312,161.64503 78.99682,284.27841"
+           id="path7067"
+           transform="translate(-848.99032,296.10995)"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g7062"
+           inkscape:connection-end="#g12957-38" />
+        <path
+           inkscape:connector-curvature="0"
+           inkscape:connection-end-point="d4"
+           inkscape:connection-start-point="d4"
+           style="fill:#ff0000;stroke:#ff0000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+           d="M 145.61323,142.48988 95.576703,166.76692"
+           id="path7069"
+           transform="translate(-848.99032,296.10995)"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g7062"
+           inkscape:connection-end="#g12945-7" />
+      </g>
+    </g>
+    <g
+       transform="translate(990.2654,-377.97948)"
+       id="g18925-6">
+      <g
+         transform="translate(0,5.2380981)"
+         id="g12933-0">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-8"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#d4aa00;fill-opacity:1;stroke:#d4aa00;font-family:Bitstream Vera Sans"
+           x="-841.76758"
+           y="358.43356"
+           id="text12629-9-3-1-9"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-4"
+             x="-841.76758"
+             y="358.43356">v4.2</tspan></text>
+      </g>
+      <g
+         id="g12945-7-0">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-2-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8-25-0"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-1-0"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         id="g12957-38-9">
+        <path
+           sodipodi:type="arc"
+           style="fill:#d4aa00;fill-opacity:0;fill-rule:evenodd;stroke:#d4aa00;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-4-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-8-7"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-6-6"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <flowRoot
+         xml:space="preserve"
+         id="flowRoot12902-3-4"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         transform="translate(-214.28571,111.42857)"><flowRegion
+           id="flowRegion12904-7-4"><rect
+             id="rect12906-4-2"
+             width="301.42856"
+             height="435.71429"
+             x="-924.28571"
+             y="320.93362" /></flowRegion><flowPara
+           id="flowPara12908-6-9" /></flowRoot>      <path
+         inkscape:connection-start="#g12933-0"
+         inkscape:connection-end="#g12945-7-0"
+         inkscape:connector-type="polyline"
+         id="path12950-5"
+         d="m -797.5,393.91867 0,41.35798"
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connection-end="#g12957-38-9"
+         inkscape:connection-start="#g12945-7-0"
+         inkscape:connector-type="polyline"
+         id="path12962-2-2"
+         d="m -797.5,533.2573 0,38.68599"
+         style="fill:#d4aa00;stroke:#d4aa00;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end-point="d4"
+         inkscape:connector-curvature="0" />
+      <g
+         id="g7062-0">
+        <path
+           sodipodi:type="arc"
+           style="opacity:0.5;fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-4-1-8"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-601.73896,221.4909)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;opacity:0.5;fill:#000000;fill-opacity:1;stroke:#000000;font-family:Bitstream Vera Sans"
+           x="-672.50494"
+           y="431.85254"
+           id="text12629-9-3-1-8-2-2-6"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7-2"
+             x="-672.50494"
+             y="431.85254">A'</tspan></text>
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-4-1-8-3"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-602.70567,72.41019)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;font-family:Bitstream Vera Sans"
+           x="-671.47168"
+           y="282.77182"
+           id="text12629-9-3-1-8-2-2-6-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7-2-8"
+             x="-671.47168"
+             y="282.77182">Aᵟ</tspan></text>
+        <path
+           style="fill:#000000;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend-8)"
+           d="m 643.10345,205.10267 0,51.72414"
+           id="path6304"
+           inkscape:connector-curvature="0"
+           transform="translate(-1302.5333,110.19876)" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM-1-7)"
+           d="m -697.8407,298.53986 -80.747,140.6978"
+           id="path6306"
+           inkscape:connector-curvature="0" />
+      </g>
+      <path
+         inkscape:connector-type="polyline"
+         id="path7067-4"
+         d="m -695.12005,452.57296 -84.97116,125.65959"
+         style="opacity:0.5;fill:#000000;stroke:#000000;stroke-width:3.06777191;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM-1)"
+         inkscape:connector-curvature="0" />
+      <path
+         inkscape:connector-type="polyline"
+         id="path7069-5"
+         d="m -705.04154,428.01168 -51.05239,29.6913"
+         style="opacity:0.5;fill:#000000;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#EmptyDiamondMend)"
+         inkscape:connector-curvature="0" />
+    </g>
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-unstable-10-sumup.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,1101 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1414.5707"
+   height="1196.5396"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.47 r22583"
+   sodipodi:docname="explain-troubles-unstable-10-sumup.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0.0"
+       refX="0.0"
+       id="Arrow1Mend"
+       style="overflow:visible;">
+      <path
+         id="path4078"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
+         transform="scale(0.4) rotate(180) translate(10,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0.0"
+       refX="0.0"
+       id="Arrow1Lend"
+       style="overflow:visible;">
+      <path
+         id="path4072"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none;"
+         transform="scale(0.8) rotate(180) translate(12.5,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0.0"
+       refX="0.0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z "
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;marker-start:none"
+         transform="scale(0.8) translate(12.5,0)" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.58"
+     inkscape:cx="460.47484"
+     inkscape:cy="579.06827"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1918"
+     inkscape:window-height="1165"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(317.55211,451.61155)">
+    <g
+       id="g16677">
+      <g
+         transform="translate(63.770124,322.85714)"
+         id="g13934">
+        <g
+           transform="translate(994.04378,-358.66548)"
+           id="g13382">
+          <g
+             style="opacity:0.5"
+             transform="translate(0,5.2380981)"
+             id="g12933-9">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-8"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-811.76758"
+               y="357.005"
+               id="text12629-9-3-1-4"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-9"
+                 x="-811.76758"
+                 y="357.005">B</tspan></text>
+          </g>
+          <g
+             style="opacity:0.5"
+             id="g12945-3">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-9-9"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="498.90979"
+               id="text12629-9-3-1-8-9"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-7-0"
+                 x="-810.71423"
+                 y="498.90979">A</tspan></text>
+          </g>
+          <g
+             id="g12957-8">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-6-3"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="635.57648"
+               id="text12629-9-3-1-83-0"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-5-1"
+                 x="-810.71423"
+                 y="635.57648">Z</tspan></text>
+          </g>
+          <path
+             inkscape:connection-end="#g12945-3"
+             inkscape:connection-start="#g12933-9"
+             inkscape:connector-type="polyline"
+             id="path12950-7"
+             d="m -797.5,393.91867 0,41.35798"
+             style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <path
+             inkscape:connection-end="#g12957-8"
+             inkscape:connection-start="#g12945-3"
+             inkscape:connector-type="polyline"
+             id="path12962-0"
+             d="m -797.5,533.2573 0,38.68599"
+             style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <g
+             id="g14080">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-67"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-651.82935"
+               y="291.59058"
+               id="text12629-9-3-1-2"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-77"
+                 x="-651.82935"
+                 y="291.59058">B'</tspan></text>
+          </g>
+          <g
+             id="g14034">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-9-2"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-650.776"
+               y="428.25726"
+               id="text12629-9-3-1-8-0"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-7-7"
+                 x="-650.776"
+                 y="428.25726">A'</tspan></text>
+          </g>
+          <path
+             inkscape:connection-end="#g12957-8"
+             inkscape:connection-start="#g14034"
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,225.45742)"
+             id="path14087"
+             d="M 181.50292,226.948 81.415976,356.68521"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <path
+             inkscape:connection-end="#g14034"
+             inkscape:connection-start="#g14080"
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,225.45742)"
+             id="path14089"
+             d="m 211.42857,100.48065 0,38.68604"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <path
+             inkscape:connection-end="#g12945-3"
+             inkscape:connection-start="#g14034"
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,225.45742)"
+             id="path14463"
+             d="M 166.6047,207.95791 96.314201,239.00866"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+          <path
+             inkscape:connection-start="#g14080"
+             inkscape:connection-end="#g12933-9"
+             transform="translate(-848.99032,225.45742)"
+             inkscape:connector-type="polyline"
+             id="path14465"
+             d="M 166.6047,71.29122 97.24687,101.92996"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+        </g>
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="224.57932"
+           y="372.93292"
+           id="text13894"><tspan
+             sodipodi:role="line"
+             id="tspan13896"
+             x="224.57932"
+             y="372.93292">Local</tspan></text>
+      </g>
+      <g
+         transform="translate(53.152706,-930.19704)"
+         id="g13910">
+        <g
+           transform="translate(999.11715,331.93758)"
+           id="g13554">
+          <g
+             transform="translate(2.11198,-3.2921448)"
+             id="g12933-2">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-1"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-811.76758"
+               y="357.005"
+               id="text12629-9-3-1-0"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-1"
+                 x="-811.76758"
+                 y="357.005">B</tspan></text>
+          </g>
+          <g
+             transform="translate(2.11198,-4.265152)"
+             id="g12945-7">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-9-0"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="498.90979"
+               id="text12629-9-3-1-8-8"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-7-07"
+                 x="-810.71423"
+                 y="498.90979">A</tspan></text>
+          </g>
+          <g
+             transform="translate(2.11198,0)"
+             id="g12957-6">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-6-7"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="635.57648"
+               id="text12629-9-3-1-83-3"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-5-9"
+                 x="-810.71423"
+                 y="635.57648">Z</tspan></text>
+          </g>
+          <path
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-end="#g12945-7"
+             inkscape:connection-start="#g12933-2"
+             inkscape:connector-type="polyline"
+             id="path12950-8"
+             d="m -795.38802,389.71981 0,43.48719"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <path
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-end="#g12957-6"
+             inkscape:connection-start="#g12945-7"
+             inkscape:connector-type="polyline"
+             id="path12962-3"
+             d="m -795.38802,531.14792 0,40.81523"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+          <g
+             transform="translate(-2.11198,0)"
+             id="g13397">
+            <path
+               sodipodi:type="arc"
+               style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-0"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-735.72429,2.41941)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-807.54364"
+               y="212.78105"
+               id="text12629-9-3-1-7"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-6"
+                 x="-807.54364"
+                 y="212.78105">C</tspan></text>
+          </g>
+          <path
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-end="#g12933-2"
+             inkscape:connection-start="#g13397"
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,296.10995)"
+             id="path13402"
+             d="m 53.602303,-49.001257 0,44.6701979"
+             style="fill:#0000ff;stroke:#0000ff;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#DotM)" />
+        </g>
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="130.22327"
+           y="1072.933"
+           id="text13898"><tspan
+             sodipodi:role="line"
+             id="tspan13900"
+             x="130.22327"
+             y="1072.933">Distant</tspan></text>
+      </g>
+    </g>
+    <g
+       id="g14037"
+       transform="translate(-12.610837,-438.21686)">
+      <g
+         id="g13702"
+         transform="translate(1669.5314,38.478002)">
+        <g
+           id="g12933-3"
+           transform="translate(0.68341,5.2381)"
+           style="opacity:0.5">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-5"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-28"
+             y="357.005"
+             x="-811.76758"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="357.005"
+               x="-811.76758"
+               id="tspan12631-6-9-0-73"
+               sodipodi:role="line">B</tspan></text>
+        </g>
+        <g
+           id="g12945-5"
+           style="opacity:0.5"
+           transform="translate(0.68341,0)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-8"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-87"
+             y="498.90979"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="498.90979"
+               x="-810.71423"
+               id="tspan12631-6-9-0-7-3"
+               sodipodi:role="line">A</tspan></text>
+        </g>
+        <g
+           id="g12957-3"
+           transform="translate(0.68341,0)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-6-8"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-83-5"
+             y="635.57648"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="635.57648"
+               x="-810.71423"
+               id="tspan12631-6-9-0-5-4"
+               sodipodi:role="line">Z</tspan></text>
+        </g>
+        <path
+           style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -796.81659,393.91659 0,41.36213"
+           id="path12950-85"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12933-3"
+           inkscape:connection-end="#g12945-5"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <path
+           style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -796.81659,533.25522 0,38.69014"
+           id="path12962-4"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12945-5"
+           inkscape:connection-end="#g12957-3"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <g
+           id="g14080-8">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-67-4"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-2-2"
+             y="291.59058"
+             x="-651.82935"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="291.59058"
+               x="-651.82935"
+               id="tspan12631-6-9-0-77-5"
+               sodipodi:role="line">B'</tspan></text>
+        </g>
+        <g
+           id="g14034-8">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-2-4"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-0-4"
+             y="428.25726"
+             x="-650.776"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="428.25726"
+               x="-650.776"
+               id="tspan12631-6-9-0-7-7-3"
+               sodipodi:role="line">A'</tspan></text>
+        </g>
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="M 181.58323,227.00991 81.848934,356.84479"
+           id="path14087-4"
+           transform="translate(-848.99032,225.45742)"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g14034-8"
+           inkscape:connection-end="#g12957-3"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m 211.42857,100.48065 0,38.68604"
+           id="path14089-8"
+           transform="translate(-848.99032,225.45742)"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g14080-8"
+           inkscape:connection-end="#g14034-8"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)"
+           d="M 166.63618,208.02892 96.585,239.10674"
+           id="path14463-7"
+           transform="translate(-848.99032,225.45742)"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g14034-8"
+           inkscape:connection-end="#g12945-5"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)"
+           d="M 166.63618,71.362225 97.512165,102.02871"
+           id="path14465-9"
+           inkscape:connector-type="polyline"
+           transform="translate(-848.99032,225.45742)"
+           inkscape:connection-end="#g12933-3"
+           inkscape:connection-start="#g14080-8"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <g
+           id="g5583"
+           transform="translate(-0.68341,0)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-738.58143,1.22892)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path4918"
+             style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text4920"
+             y="211.59058"
+             x="-810.40076"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="211.59058"
+               x="-810.40076"
+               id="tspan4922"
+               sodipodi:role="line">C</tspan></text>
+        </g>
+        <path
+           style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+           d="m 52.173733,20.478573 0,50.004102"
+           id="path5588"
+           inkscape:connector-type="polyline"
+           inkscape:connector-curvature="3"
+           inkscape:connection-start="#g5583"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end="#g12933-3"
+           inkscape:connection-end-point="d4"
+           transform="translate(-848.99032,225.45742)" />
+      </g>
+      <text
+         id="text13902"
+         y="781.50439"
+         x="801.03363"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="781.50439"
+           x="801.03363"
+           id="tspan13904"
+           sodipodi:role="line">final = <tspan
+   id="tspan14035"
+   style="fill:#ff0000;stroke:#ff0000">instable</tspan></tspan></text>
+    </g>
+    <g
+       id="g14074"
+       transform="translate(12.068966,-361.47806)">
+      <g
+         id="g13288"
+         transform="translate(531.43821,-33.336839)">
+        <g
+           id="g12933"
+           transform="translate(0,5.2380981)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1"
+             y="357.005"
+             x="-811.76758"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="357.005"
+               x="-811.76758"
+               id="tspan12631-6-9-0"
+               sodipodi:role="line">B</tspan></text>
+        </g>
+        <g
+           id="g12945">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8"
+             y="498.90979"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="498.90979"
+               x="-810.71423"
+               id="tspan12631-6-9-0-7"
+               sodipodi:role="line">A</tspan></text>
+        </g>
+        <g
+           id="g12957">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-6"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-83"
+             y="635.57648"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="635.57648"
+               x="-810.71423"
+               id="tspan12631-6-9-0-5"
+               sodipodi:role="line">Z</tspan></text>
+        </g>
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -797.5,393.91867 0,41.35798"
+           id="path12950"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12933"
+           inkscape:connection-end="#g12945" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -797.5,533.2573 0,38.68599"
+           id="path12962"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12945"
+           inkscape:connection-end="#g12957" />
+      </g>
+      <text
+         id="text13906"
+         y="704.36151"
+         x="-321.08133"
+         style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+         xml:space="preserve"><tspan
+           y="704.36151"
+           x="-321.08133"
+           id="tspan13908"
+           sodipodi:role="line">initial</tspan></text>
+    </g>
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -148.90439,71.107869 115.52431,-150.21739"
+       id="path14093" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M -116.60064,185.59571 141.08898,310.8959"
+       id="path14093-1" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="m 377.16638,-147.48298 351.94233,55.511595"
+       id="path14093-4"
+       inkscape:transform-center-x="48.58484"
+       inkscape:transform-center-y="-19.640393" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:8.96527767;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-start:none;marker-end:url(#Arrow1Mend)"
+       d="M 516.3549,303.21782 766.85794,121.81435"
+       id="path14093-42" />
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/explain-troubles-unstable-15-solution.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,1006 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="637.31207"
+   height="614.44788"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="explain-troubles-unstable-15-solution.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path4078"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path4072"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.8,0,0,0.8,10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-6"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6393-3"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8630"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path8632"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8634"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path8636"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8638"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path8640"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-2"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path6456-7"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8644"
+       style="overflow:visible">
+      <path
+         inkscape:connector-curvature="0"
+         id="path8646"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.58"
+     inkscape:cx="446.08569"
+     inkscape:cy="388.21623"
+     inkscape:document-units="px"
+     inkscape:current-layer="g13702-1"
+     showgrid="false"
+     inkscape:window-width="1215"
+     inkscape:window-height="776"
+     inkscape:window-x="65"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     fit-margin-top="5"
+     fit-margin-right="5"
+     fit-margin-bottom="5"
+     fit-margin-left="5" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-804.0536,336.234)">
+    <g
+       transform="translate(1656.9206,-399.73886)"
+       id="g13702">
+      <g
+         style="opacity:0.5"
+         transform="translate(0.68341,5.2381)"
+         id="g12933-3">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-811.76758"
+           y="357.005"
+           id="text12629-9-3-1-28"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-73"
+             x="-811.76758"
+             y="357.005">B</tspan></text>
+      </g>
+      <g
+         transform="translate(0.68341,0)"
+         style="opacity:0.5"
+         id="g12945-5">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-8"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8-87"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-3"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(0.68341,0)"
+         id="g12957-3">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-8"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-4"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12945-5"
+         inkscape:connection-start="#g12933-3"
+         inkscape:connector-type="polyline"
+         id="path12950-85"
+         d="m -796.81659,393.9166 0,41.36212"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12957-3"
+         inkscape:connection-start="#g12945-5"
+         inkscape:connector-type="polyline"
+         id="path12962-4"
+         d="m -796.81659,533.25522 0,38.69014"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <g
+         id="g14080-8">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-67-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-651.82935"
+           y="291.59058"
+           id="text12629-9-3-1-2-2"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-77-5"
+             x="-651.82935"
+             y="291.59058">B'</tspan></text>
+      </g>
+      <g
+         id="g14034-8">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-2-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-650.776"
+           y="428.25726"
+           id="text12629-9-3-1-8-0-4"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7-3"
+             x="-650.776"
+             y="428.25726">A'</tspan></text>
+      </g>
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12957-3"
+         inkscape:connection-start="#g14034-8"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14087-4"
+         d="M 181.58323,227.00991 81.848934,356.84479"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g14034-8"
+         inkscape:connection-start="#g14080-8"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14089-8"
+         d="m 211.42857,100.48065 0,38.68604"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12945-5"
+         inkscape:connection-start="#g14034-8"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14463-7"
+         d="M 166.63618,208.02892 96.585,239.10674"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-start="#g14080-8"
+         inkscape:connection-end="#g12933-3"
+         transform="translate(-848.99032,225.45742)"
+         inkscape:connector-type="polyline"
+         id="path14465-9"
+         d="M 166.63618,71.362225 97.512166,102.02872"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+      <g
+         transform="translate(-0.68341,0)"
+         id="g5583">
+        <path
+           sodipodi:type="arc"
+           style="fill:#ff0000;fill-opacity:0;fill-rule:evenodd;stroke:#ff0000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path4918"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-738.58143,1.22892)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#ff0000;fill-opacity:1;stroke:#ff0000;font-family:Bitstream Vera Sans"
+           x="-810.40076"
+           y="211.59058"
+           id="text4920"><tspan
+             sodipodi:role="line"
+             id="tspan4922"
+             x="-810.40076"
+             y="211.59058">C</tspan></text>
+      </g>
+      <path
+         transform="translate(-848.99032,225.45742)"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-end="#g12933-3"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-start="#g5583"
+         inkscape:connector-curvature="3"
+         inkscape:connector-type="polyline"
+         id="path5588"
+         d="m 52.173733,20.478573 0,50.004103"
+         style="opacity:0.98000004;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#marker8638)" />
+    </g>
+    <g
+       transform="translate(2022.8785,-401.87475)"
+       id="g13702-1">
+      <g
+         style="opacity:0.5"
+         transform="translate(0.68341,5.2381)"
+         id="g12933-3-2">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-5-9"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-811.76758"
+           y="357.005"
+           id="text12629-9-3-1-28-1"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-73-6"
+             x="-811.76758"
+             y="357.005">B</tspan></text>
+      </g>
+      <g
+         transform="translate(0.68341,0)"
+         style="opacity:0.5"
+         id="g12945-5-4">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-8-0"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="498.90979"
+           id="text12629-9-3-1-8-87-7"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-3-6"
+             x="-810.71423"
+             y="498.90979">A</tspan></text>
+      </g>
+      <g
+         transform="translate(0.68341,0)"
+         id="g12957-3-9">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-6-8-4"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-810.71423"
+           y="635.57648"
+           id="text12629-9-3-1-83-5-9"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-5-4-8"
+             x="-810.71423"
+             y="635.57648">Z</tspan></text>
+      </g>
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12945-5-4"
+         inkscape:connection-start="#g12933-3-2"
+         inkscape:connector-type="polyline"
+         id="path12950-85-4"
+         d="m -796.81659,393.9166 0,41.36212"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12957-3-9"
+         inkscape:connection-start="#g12945-5-4"
+         inkscape:connector-type="polyline"
+         id="path12962-4-3"
+         d="m -796.81659,533.25522 0,38.69014"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <g
+         id="g14080-8-5">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-67-4-3"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-651.82935"
+           y="291.59058"
+           id="text12629-9-3-1-2-2-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-77-5-6"
+             x="-651.82935"
+             y="291.59058">B'</tspan></text>
+      </g>
+      <g
+         id="g14034-8-4">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-9-2-4-3"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="-650.776"
+           y="428.25726"
+           id="text12629-9-3-1-8-0-4-6"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-7-7-3-3"
+             x="-650.776"
+             y="428.25726">A'</tspan></text>
+      </g>
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12957-3-9"
+         inkscape:connection-start="#g14034-8-4"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14087-4-0"
+         d="M 181.58323,227.00991 81.848934,356.84479"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g14034-8-4"
+         inkscape:connection-start="#g14080-8-5"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14089-8-4"
+         d="m 211.42857,100.48065 0,38.68604"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-end="#g12945-5-4"
+         inkscape:connection-start="#g14034-8-4"
+         inkscape:connector-type="polyline"
+         transform="translate(-848.99032,225.45742)"
+         id="path14463-7-3"
+         d="M 166.63618,208.02892 96.585,239.10674"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+      <path
+         inkscape:connector-curvature="0"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-start="#g14080-8-5"
+         inkscape:connection-end="#g12933-3-2"
+         transform="translate(-848.99032,225.45742)"
+         inkscape:connector-type="polyline"
+         id="path14465-9-9"
+         d="M 166.63618,71.362225 97.512166,102.02872"
+         style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-start:none;marker-mid:none;marker-end:url(#EmptyDiamondMend)" />
+      <g
+         transform="translate(-0.68341,0)"
+         id="g5583-2"
+         style="opacity:0.5;fill:#000000;stroke:#000000">
+        <path
+           sodipodi:type="arc"
+           style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path4918-6"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-738.58143,1.22892)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;font-family:Bitstream Vera Sans"
+           x="-810.40076"
+           y="211.59058"
+           id="text4920-1"><tspan
+             sodipodi:role="line"
+             id="tspan4922-9"
+             x="-810.40076"
+             y="211.59058">C</tspan></text>
+      </g>
+      <path
+         transform="translate(-848.99032,225.45742)"
+         inkscape:connection-end-point="d4"
+         inkscape:connection-end="#g12933-3-2"
+         inkscape:connection-start-point="d4"
+         inkscape:connection-start="#g5583-2"
+         inkscape:connector-curvature="3"
+         inkscape:connector-type="polyline"
+         id="path5588-9"
+         d="m 52.173733,20.478573 0,50.004103"
+         style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#marker8638)" />
+      <g
+         transform="translate(-4.5930013,-154.28292)"
+         id="g14080-8-5-0"
+         style="fill:#0000ff;stroke:#0000ff">
+        <path
+           sodipodi:type="arc"
+           style="fill:#0000ff;fill-opacity:0;fill-rule:evenodd;stroke:#0000ff;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+           id="path12627-8-4-1-67-4-3-2"
+           sodipodi:cx="-172.85715"
+           sodipodi:cy="399.50504"
+           sodipodi:rx="147.14285"
+           sodipodi:ry="100"
+           d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+           transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)" />
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#0000ff;fill-opacity:1;stroke:#0000ff;font-family:Bitstream Vera Sans"
+           x="-651.82935"
+           y="291.59058"
+           id="text12629-9-3-1-2-2-5-5"><tspan
+             sodipodi:role="line"
+             id="tspan12631-6-9-0-77-5-6-1"
+             x="-651.82935"
+             y="291.59058">C'</tspan></text>
+      </g>
+    </g>
+    <path
+       style="fill:#0000ff;stroke:#0000ff;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#marker8638)"
+       d="m 1380.7238,-230.93407 0,58.53617"
+       id="path9998"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:3, 3;stroke-dashoffset:0;marker-end:url(#marker8644)"
+       d="m 1653.4483,189.643 -63.7931,37.93103"
+       id="path10000"
+       inkscape:connector-curvature="0"
+       transform="translate(-317.55211,-451.61155)" />
+  </g>
+</svg>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docs/figures/git.svg	Wed Oct 10 15:11:31 2012 +0200
@@ -0,0 +1,863 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="910.36212"
+   height="598.43103"
+   id="svg12964"
+   version="1.1"
+   inkscape:version="0.48.3.1 r9886"
+   sodipodi:docname="git.svg">
+  <defs
+     id="defs12966">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible">
+      <path
+         id="path4078"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible">
+      <path
+         id="path4072"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible">
+      <path
+         id="path4069"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.8,0,0,0.8,10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 526.18109 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_z="744.09448 : 526.18109 : 1"
+       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
+       id="perspective12972" />
+    <inkscape:perspective
+       id="perspective13312"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible">
+      <path
+         id="path6393"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13318"
+       style="overflow:visible">
+      <path
+         id="path13320"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13418"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-1"
+       style="overflow:visible">
+      <path
+         id="path6393-1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13424"
+       style="overflow:visible">
+      <path
+         id="path13426"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13428"
+       style="overflow:visible">
+      <path
+         id="path13430"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13432"
+       style="overflow:visible">
+      <path
+         id="path13434"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend"
+       style="overflow:visible">
+      <path
+         id="path6456"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13438"
+       style="overflow:visible">
+      <path
+         id="path13440"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13583"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-0"
+       style="overflow:visible">
+      <path
+         id="path6393-5"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13589"
+       style="overflow:visible">
+      <path
+         id="path13591"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13593"
+       style="overflow:visible">
+      <path
+         id="path13595"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective13743"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM-2"
+       style="overflow:visible">
+      <path
+         id="path6393-2"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13749"
+       style="overflow:visible">
+      <path
+         id="path13751"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13753"
+       style="overflow:visible">
+      <path
+         id="path13755"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13757"
+       style="overflow:visible">
+      <path
+         id="path13759"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none;marker-end:none"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="EmptyDiamondMend-3"
+       style="overflow:visible">
+      <path
+         id="path6456-4"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="EmptyDiamondMend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13763"
+       style="overflow:visible">
+      <path
+         id="path13765"
+         d="M 0,-7.0710768 -7.0710894,0 0,7.0710589 7.0710462,0 0,-7.0710768 z"
+         style="fill:#ffffff;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(0.4,0,0,0.4,-2.6,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-2"
+       style="overflow:visible">
+      <path
+         id="path4072-8"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-5"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-6"
+       style="overflow:visible">
+      <path
+         id="path4072-7"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:perspective
+       id="perspective15593-1"
+       inkscape:persp3d-origin="0.5 : 0.33333333 : 1"
+       inkscape:vp_z="1 : 0.5 : 1"
+       inkscape:vp_y="0 : 1000 : 0"
+       inkscape:vp_x="0 : 0.5 : 1"
+       sodipodi:type="inkscape:persp3d" />
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend-29"
+       style="overflow:visible">
+      <path
+         id="path4072-70"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 z"
+         style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt;marker-start:none"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.7"
+     inkscape:cx="267.70686"
+     inkscape:cy="266.91354"
+     inkscape:document-units="px"
+     inkscape:current-layer="g13382"
+     showgrid="false"
+     inkscape:window-width="1280"
+     inkscape:window-height="776"
+     inkscape:window-x="0"
+     inkscape:window-y="24"
+     inkscape:window-maximized="1"
+     fit-margin-top="5"
+     fit-margin-bottom="5"
+     fit-margin-right="5"
+     fit-margin-left="5" />
+  <metadata
+     id="metadata12969">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-120.93016,350.21716)">
+    <g
+       id="g16677"
+       transform="translate(-83.33333,-403.33333)">
+      <g
+         transform="translate(63.770124,322.85714)"
+         id="g13934">
+        <g
+           transform="translate(994.04378,-358.66548)"
+           id="g13382">
+          <g
+             style="opacity:0.5"
+             transform="translate(0,5.2380981)"
+             id="g12933-9">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-8"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-811.76758"
+               y="357.005"
+               id="text12629-9-3-1-4"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-9"
+                 x="-811.76758"
+                 y="357.005">B</tspan></text>
+          </g>
+          <g
+             style="opacity:0.5"
+             id="g12945-3">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-9-9"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="498.90979"
+               id="text12629-9-3-1-8-9"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-7-0"
+                 x="-810.71423"
+                 y="498.90979">A</tspan></text>
+          </g>
+          <g
+             id="g12957-8">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-6-3"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-810.71423"
+               y="635.57648"
+               id="text12629-9-3-1-83-0"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-5-1"
+                 x="-810.71423"
+                 y="635.57648">Z</tspan></text>
+          </g>
+          <path
+             inkscape:connector-type="polyline"
+             id="path12950-7"
+             d="m -797.5,393.91867 0,41.35798"
+             style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-end="#g12945-3"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-start="#g12933-9" />
+          <path
+             inkscape:connector-type="polyline"
+             id="path12962-0"
+             d="m -797.5,533.2573 0,38.68599"
+             style="opacity:0.5;fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-end="#g12957-8"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-start="#g12945-3" />
+          <g
+             id="g14080">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-67"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-651.82935"
+               y="291.59058"
+               id="text12629-9-3-1-2"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-77"
+                 x="-651.82935"
+                 y="291.59058">B'</tspan></text>
+          </g>
+          <g
+             id="g14034">
+            <path
+               sodipodi:type="arc"
+               style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+               id="path12627-8-4-1-9-2"
+               sodipodi:cx="-172.85715"
+               sodipodi:cy="399.50504"
+               sodipodi:rx="147.14285"
+               sodipodi:ry="100"
+               d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+               transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)" />
+            <text
+               xml:space="preserve"
+               style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+               x="-650.776"
+               y="428.25726"
+               id="text12629-9-3-1-8-0"><tspan
+                 sodipodi:role="line"
+                 id="tspan12631-6-9-0-7-7"
+                 x="-650.776"
+                 y="428.25726">A'</tspan></text>
+          </g>
+          <path
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,225.45742)"
+             id="path14087"
+             d="M 181.50292,226.948 81.415976,356.68521"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+             inkscape:connector-curvature="0"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-start="#g14034"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-end="#g12957-8" />
+          <path
+             inkscape:connector-type="polyline"
+             transform="translate(-848.99032,225.45742)"
+             id="path14089"
+             d="m 211.42857,100.48065 0,38.68604"
+             style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+             inkscape:connector-curvature="0"
+             inkscape:connection-end-point="d4"
+             inkscape:connection-end="#g14034"
+             inkscape:connection-start-point="d4"
+             inkscape:connection-start="#g14080" />
+        </g>
+        <text
+           xml:space="preserve"
+           style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+           x="224.57932"
+           y="372.93292"
+           id="text13894"><tspan
+             sodipodi:role="line"
+             id="tspan13896"
+             x="224.57932"
+             y="372.93292" /></text>
+      </g>
+    </g>
+    <g
+       id="g14037"
+       transform="translate(-209.2775,-468.21686)">
+      <g
+         id="g13702"
+         transform="translate(1669.5314,38.478002)">
+        <g
+           id="g12933-3"
+           transform="translate(0.68341,5.2381)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,146.64336)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-5"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-28"
+             y="357.005"
+             x="-811.76758"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="357.005"
+               x="-811.76758"
+               id="tspan12631-6-9-0-73"
+               sodipodi:role="line">B</tspan></text>
+        </g>
+        <g
+           id="g12945-5"
+           transform="translate(0.68341,0)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,288.54815)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-8"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-87"
+             y="498.90979"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="498.90979"
+               x="-810.71423"
+               id="tspan12631-6-9-0-7-3"
+               sodipodi:role="line">A</tspan></text>
+        </g>
+        <g
+           id="g12957-3"
+           transform="translate(0.68341,0)">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-739.94825,425.21479)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-6-8"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-83-5"
+             y="635.57648"
+             x="-810.71423"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="635.57648"
+               x="-810.71423"
+               id="tspan12631-6-9-0-5-4"
+               sodipodi:role="line">Z</tspan></text>
+        </g>
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -796.81659,393.9166 0,41.36212"
+           id="path12950-85"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12933-3"
+           inkscape:connection-end="#g12945-5"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <path
+           style="fill:#000000;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m -796.81659,533.25522 0,38.69014"
+           id="path12962-4"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g12945-5"
+           inkscape:connection-end="#g12957-3"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0" />
+        <g
+           id="g14080-8">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-580.01,81.22892)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-67-4"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-2-2"
+             y="291.59058"
+             x="-651.82935"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="291.59058"
+               x="-651.82935"
+               id="tspan12631-6-9-0-77-5"
+               sodipodi:role="line">B'</tspan></text>
+        </g>
+        <g
+           id="g14034-8">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-580.01,217.89561)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path12627-8-4-1-9-2-4"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text12629-9-3-1-8-0-4"
+             y="428.25726"
+             x="-650.776"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:none;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="428.25726"
+               x="-650.776"
+               id="tspan12631-6-9-0-7-7-3"
+               sodipodi:role="line">A'</tspan></text>
+        </g>
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="M 181.58323,227.00991 81.848934,356.84479"
+           id="path14087-4"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g14034-8"
+           inkscape:connection-end="#g12957-3"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0"
+           transform="translate(-848.99032,225.45742)" />
+        <path
+           style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#DotM)"
+           d="m 211.42857,100.48065 0,38.68604"
+           id="path14089-8"
+           inkscape:connector-type="polyline"
+           inkscape:connection-start="#g14080-8"
+           inkscape:connection-end="#g14034-8"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end-point="d4"
+           inkscape:connector-curvature="0"
+           transform="translate(-848.99032,225.45742)" />
+        <g
+           id="g5583"
+           transform="translate(-0.68341,0)"
+           style="fill:#000000;stroke:#000000">
+          <path
+             transform="matrix(0.33294398,0,0,0.48990327,-738.58143,1.22892)"
+             d="m -25.714294,399.50504 c 0,55.22847 -65.8781,100 -147.142856,100 -81.26475,0 -147.14285,-44.77153 -147.14285,-100 0,-55.22848 65.8781,-100 147.14285,-100 81.264756,0 147.142856,44.77152 147.142856,100 z"
+             sodipodi:ry="100"
+             sodipodi:rx="147.14285"
+             sodipodi:cy="399.50504"
+             sodipodi:cx="-172.85715"
+             id="path4918"
+             style="fill:#000000;fill-opacity:0;fill-rule:evenodd;stroke:#000000;stroke-width:12.38024521;stroke-linejoin:round;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0"
+             sodipodi:type="arc" />
+          <text
+             id="text4920"
+             y="211.59058"
+             x="-810.40076"
+             style="font-size:40px;font-style:normal;font-weight:normal;fill:#000000;fill-opacity:1;stroke:#000000;font-family:Bitstream Vera Sans"
+             xml:space="preserve"><tspan
+               y="211.59058"
+               x="-810.40076"
+               id="tspan4922"
+               sodipodi:role="line">C</tspan></text>
+        </g>
+        <path
+           style="fill:#000000;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+           d="m 52.173733,20.478573 0,50.004103"
+           id="path5588"
+           inkscape:connector-type="polyline"
+           inkscape:connector-curvature="3"
+           inkscape:connection-start="#g5583"
+           inkscape:connection-start-point="d4"
+           inkscape:connection-end="#g12933-3"
+           inkscape:connection-end-point="d4"
+           transform="translate(-848.99032,225.45742)" />
+      </g>
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="199.11453"
+       y="-241.73866"
+       id="text17638"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan17640"
+         x="199.11453"
+         y="-241.73866"
+         style="fill:#0000ff;stroke:#0000ff">feature-babar</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="531.01886"
+       y="-314.82654"
+       id="text17638-9"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan17640-9"
+         x="531.01886"
+         y="-314.82654"
+         style="fill:#0000ff;stroke:#0000ff"><tspan
+   style="fill:#008000;stroke:#008000"
+   id="tspan17684">other/</tspan>feature-babar</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
+       x="751.01886"
+       y="-222.82655"
+       id="text17638-9-2"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan17640-9-8"
+         x="751.01886"
+         y="-222.82655"
+         style="fill:#0000ff;stroke:#0000ff">feature-babar</tspan></text>
+  </g>
+</svg>
--- a/docs/instability.rst	Thu Sep 20 23:14:59 2012 +0200
+++ b/docs/instability.rst	Wed Oct 10 15:11:31 2012 +0200
@@ -32,9 +32,8 @@
 changing B content too. This requires the creation of **another**
 changeset, which is semantically good.
 
-::
+.. figure:: ./figures/edit-is-rewrite-step2.svg
 
-  Schema base,  A, B and B'
 
 To avoid duplication, the older changeset is usually discarded from accessible
 history. I'm calling them *obsolete* changesets.
@@ -116,7 +115,7 @@
 This allow much more flexible workflow but two major feature are lost in the
 process:
 
-:Graceful merge: MQ use plain-patch to store changeset content and patch have
+:graceful merge: MQ use plain-patch to store changeset content and patch have
                  trouble to apply in changing context. Applying your queue
                  becomes very painful when context changes.
 
--- a/docs/obs-concept.rst	Thu Sep 20 23:14:59 2012 +0200
+++ b/docs/obs-concept.rst	Wed Oct 10 15:11:31 2012 +0200
@@ -57,15 +57,8 @@
 *meaningful*.
 
 
-.. warning:: add a schema::
+.. figure:: ./figures/git.*
 
-        C
-        | B---<foo>
-        |/
-        |
-        A
-
-    Only B and A are visible.
 
 This simplifies the process of getting rid of old changesets. You can
 just leave them in place and move the reference on the new one. You
@@ -300,8 +293,7 @@
 will keep the same parent than `A'` and `A''` with two obsolete
 markers pointing to both `A` and `A'`
 
-.. warning::  TODO: Add a schema of the resolution. (merge A' and A'' with A as
-              ancestor and graft the result of A^)
+.. figure:: ./figures/explain-troubles-concurrent-10-solution.*
 
 Allowing multiple new changesets to obsolete a single one allows to
 distinguish a split changeset from a history rewriting conflict.
@@ -325,12 +317,14 @@
 * *newer* version of a public changeset are called **latecomer** and
   highlighted as an error case.
 
+.. figure:: ./figures/explain-troubles-concurrent-10-sumup.*
+
 Solving such an error is easy. Because we know what changeset a
 *latecomer* tries to rewrite, we can easily compute a smaller
 changeset containing only the change from the old *public* to the new
 *latecomer*.
 
-.. warning:: add a schema
+.. figure:: ./figures/explain-troubles-concurrent-15-solution.*
 
 
 Conclusion
--- a/docs/obs-terms.rst	Thu Sep 20 23:14:59 2012 +0200
+++ b/docs/obs-terms.rst	Wed Oct 10 15:11:31 2012 +0200
@@ -104,7 +104,7 @@
 |                     | for *troubled*           |                             |
 |                     | changeset to combine     | (possible alternative name: |
 |                     | multiple issue at once.  | precarious)                 |
-|                     | (a.k.a. conflicting and  |                             |
+|                     | (a.k.a. divergent   and  |                             |
 |                     | unstable)                +-----------------------------+
 |                     |                          |                             |
 |                     | (possible alternative    | **latecomer**               |
@@ -125,17 +125,17 @@
 |                     |                          | mindless, disenchanting)    |
 |                     |                          |                             |
 |                     |                          +-----------------------------+
-|                     |                          | **conflicting**             |
+|                     |                          | **divergent**               |
 |                     |                          |                             |
-|                     |                          | *conflicting* is changeset  |
+|                     |                          | *divergent*   is changeset  |
 |                     |                          | that appears when multiple  |
 |                     |                          | changesets are successors   |
 |                     |                          | of the same precursor.      |
 |                     |                          |                             |
-|                     |                          | *conflicting* are solved    |
+|                     |                          | *divergent*   are solved    |
 |                     |                          | through a three ways merge  |
 |                     |                          | between the two             |
-|                     |                          | *conflictings*,             |
+|                     |                          | *divergent*   ,             |
 |                     |                          | using the last "obsolete-   |
 |                     |                          | -common-ancestor" as the    |
 |                     |                          | base.                       |
@@ -145,7 +145,8 @@
 |                     |                          | conflict)                   |
 |                     |                          |                             |
 |                     |                          | (possible alternative names:|
-|                     |                          | clashing, rival)            |
+|                     |                          | clashing, rival, concurent, |
+|                     |                          | conflicting)                |
 |                     |                          |                             |
 |                     +--------------------------+-----------------------------+
 |                     |                                                        |
@@ -182,7 +183,7 @@
 
           - "ok" changeset
           - latecomer
-          - conflicting
+          - divergent
 
           Any better idea are welcome.
 
@@ -232,7 +233,7 @@
 ```````````````
 
 Automatically resolve *troublesome* changesets
-(*unstable*, *latecomer* and *conflicting*)
+(*unstable*, *latecomer* and *divergent*)
 
 This is an important name as hg pull/push will suggest it the same way it
 suggest merging when you add heads.
--- a/hgext/evolve.py	Thu Sep 20 23:14:59 2012 +0200
+++ b/hgext/evolve.py	Wed Oct 10 15:11:31 2012 +0200
@@ -295,6 +295,25 @@
 reposetup = eh.final_reposetup
 
 #####################################################################
+### Critical fix                                                  ###
+#####################################################################
+
+@eh.wrapfunction(mercurial.obsolete, '_readmarkers')
+def safereadmarkers(orig, data):
+    """safe maker wrapper to remove nullid succesors
+
+    Nullid successors was created by older version of evolve.
+    """
+    for marker in orig(data):
+        if nullid in marker[1]:
+            marker = (marker[0],
+                      tuple(s for s in marker[1] if s != nullid),
+                      marker[2],
+                      marker[3])
+        yield marker
+
+
+#####################################################################
 ### Obsolescence Caching Logic                                    ###
 #####################################################################
 
@@ -554,6 +573,15 @@
     conf = getobscache(repo, 'conflicting')
     return [r for r in subset if r in conf]
 
+@eh.revset('divergent')
+def revsetdivergent(repo, subset, x):
+    """``divergent()``
+    Changesets marked as successors of a same changeset.
+    """
+    args = revset.getargs(x, 0, 0, 'divergent takes no arguments')
+    conf = getobscache(repo, 'conflicting')
+    return [r for r in subset if r in conf]
+
 
 ### Discovery wrapping