--- a/schemas/base.py	Tue Apr 07 10:46:40 2009 +0200
+++ b/schemas/base.py	Wed Apr 08 09:38:58 2009 +0200
@@ -212,6 +212,10 @@
     """link a state to one or more entity type"""
 class transition_of(MetaRelationType):
     """link a transition to one or more entity type"""
+class condition(MetaRelationType):
+    """link a transition to one or more rql expression allowing to go through
+    this transition
+    """
     
 class initial_state(MetaRelationType):
     """indicate which state should be used by default when an entity using