--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/xy.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,34 @@
+# 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/>.
+"""map standard cubicweb schema to xml vocabularies"""
+
+from yams import xy
+
+xy.register_prefix('rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#')
+xy.register_prefix('dc', 'http://purl.org/dc/elements/1.1/')
+xy.register_prefix('foaf', 'http://xmlns.com/foaf/0.1/')
+xy.register_prefix('doap', 'http://usefulinc.com/ns/doap#')
+xy.register_prefix('owl', 'http://www.w3.org/2002/07/owl#')
+xy.register_prefix('dcterms', 'http://purl.org/dc/terms/')
+
+xy.add_equivalence('creation_date', 'dc:date')
+xy.add_equivalence('created_by', 'dc:creator')
+xy.add_equivalence('description', 'dc:description')
+xy.add_equivalence('CWUser', 'foaf:Person')
+xy.add_equivalence('CWUser login', 'foaf:Person dc:title')
+xy.add_equivalence('CWUser surname', 'foaf:Person foaf:name')