[schema] Add permissions to TransformationSequence entity type

migration/0.3.0_Any.py

 sync_schema_props_perms('transformation_sequence')
+sync_schema_props_perms('TransformationSequence')

schema.py

@@ -209,10 +209,22 @@ class transformation_sequence(RelationDefinition):
     cardinality = '1*'
 
 
+_transformationsequence_update_perms = (
+    ERQLExpression('U in_group G, G name IN ("managers", "users"), '
+                   'NOT EXISTS(P transformation_sequence X) OR '
+                   'EXISTS(P transformation_sequence X,'
+                   '       P name "wfs_dataprocess_initialized")'),
+)
+
+
 class TransformationSequence(EntityType):
     """A sequence of scripts involved in a given process."""
-    # TODO __permissions__
-    # name = String(required=True) XXX useful?
+    __permissions__ = {
+        'read': ('managers', 'users', 'guests'),
+        'update': _transformationsequence_update_perms,
+        'delete': _transformationsequence_update_perms,
+        'add': ('managers', 'users')
+    }
 
 
 class TransformationStep(EntityType):