diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/misc/migration/3.11.0_Any.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/misc/migration/3.11.0_Any.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,11 @@
+from datetime import datetime
+
+for rtype in ('cw_support', 'cw_dont_cross', 'cw_may_cross'):
+    drop_relation_type(rtype)
+
+add_entity_type('CWSourceSchemaConfig')
+
+if not 'url' in schema['CWSource'].subjrels:
+    add_attribute('CWSource', 'url')
+    add_attribute('CWSource', 'parser')
+    add_attribute('CWSource', 'latest_retrieval')