--- a/spa2rql.py	Tue Jun 01 08:35:09 2010 +0200
+++ b/spa2rql.py	Tue Jun 01 08:54:40 2010 +0200
@@ -15,9 +15,8 @@
 #
 # You should have received a copy of the GNU Lesser General Public License along
 # with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
-"""SPARQL -> RQL translator
+"""SPARQL -> RQL translator"""
 
-"""
 from logilab.common import make_domains
 from rql import TypeResolverException
 from fyzz.yappsparser import parse
@@ -98,8 +97,8 @@
                         modified = True
                 # restrict predicates according to allowed subject var types
                 if subjvar in self.possible_types:
-                    yams_predicates = [(s, r, o) for s, r, o in yams_predicates
-                                       if s == '*' or s in self.possible_types[subjvar]]
+                    yams_predicates[:] = [(s, r, o) for s, r, o in yams_predicates
+                                          if s == '*' or s in self.possible_types[subjvar]]
                 if isinstance(obj, ast.SparqlVar):
                     # make a valid rql var name
                     objvar = obj.name.upper()
@@ -111,8 +110,8 @@
                             modified = True
                     # restrict predicates according to allowed object var types
                     if objvar in self.possible_types:
-                        yams_predicates = [(s, r, o) for s, r, o in yams_predicates
-                                           if o == '*' or o in self.possible_types[objvar]]
+                        yams_predicates[:] = [(s, r, o) for s, r, o in yams_predicates
+                                              if o == '*' or o in self.possible_types[objvar]]
                 # ensure this still make sense
                 if not yams_predicates:
                     raise TypeResolverException()
@@ -197,7 +196,8 @@
                 raise UnsupportedQuery()
             # make a valid rql var name
             subjvar = subj.name.upper()
-            if predicate == ('', 'a'):
+            if predicate in [('', 'a'),
+                             ('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'type')]:
                 # special 'is' relation
                 if not isinstance(obj, tuple):
                     raise UnsupportedQuery()

--- a/test/unittest_spa2rql.py	Tue Jun 01 08:35:09 2010 +0200
+++ b/test/unittest_spa2rql.py	Tue Jun 01 08:54:40 2010 +0200
@@ -188,7 +188,7 @@
     WHERE  {
       ?project a doap:Project;
               dc:title ?title.
-    }''', 'Any PROJECT,TITLE WHERE PROJECT name TITLE, PROJECT is Project')
+    }''', 'Any PROJECT, TITLE WHERE PROJECT name TITLE, PROJECT is Project')
 
 # # Two elements in the group
 # PREFIX :  <http://example.org/ns#>

--- a/xy.py	Tue Jun 01 08:35:09 2010 +0200
+++ b/xy.py	Tue Jun 01 08:54:40 2010 +0200
@@ -15,9 +15,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public License along
 # with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
-"""map standard cubicweb schema to xml vocabularies
-
-"""
+"""map standard cubicweb schema to xml vocabularies"""
 
 from yams import xy