diff -r 57edd7e51496 -r f3286e817f28 schema.py
--- a/schema.py	Fri Jul 19 15:52:06 2013 +0200
+++ b/schema.py	Thu Jul 18 22:18:50 2013 +0200
@@ -84,7 +84,7 @@
                       'WorkflowTransition', 'BaseTransition',
                       'SubWorkflowExitPoint'))
 
-INTERNAL_TYPES = set(('CWProperty', 'CWCache', 'ExternalUri',
+INTERNAL_TYPES = set(('CWProperty', 'CWCache', 'ExternalUri', 'CWDataImport',
                       'CWSource', 'CWSourceHostConfig', 'CWSourceSchemaConfig'))