diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/devtools/test/data/schema.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/devtools/test/data/schema.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,32 @@
+# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+"""
+from yams.buildobjs import EntityType, SubjectRelation, String, Int, Date
+
+from cubes.person.schema import Person
+
+Person.add_relation(Date(), 'birthday')
+
+class Bug(EntityType):
+    title = String(maxsize=64, required=True, fulltextindexed=True)
+    severity = String(vocabulary=('important', 'normal', 'minor'), default='normal')
+    cost = Int()
+    description	= String(maxsize=4096, fulltextindexed=True)
+    identical_to = SubjectRelation('Bug', symmetric=True)