diff -r babfecf81c33 -r 17ce08b81775 plcopen/structures.py
--- a/plcopen/structures.py	Fri Apr 25 10:53:18 2008 +0200
+++ b/plcopen/structures.py	Fri May 23 10:42:09 2008 +0200
@@ -334,6 +334,13 @@
     else:
         return True
 
+def GetBaseType(type):
+    parent_type = TypeHierarchy[type]
+    if parent_type.startswith("ANY"):
+        return type
+    else:
+        return GetBaseType(parent_type)
+
 def GetDataTypeRange(reference):
     while reference is not None:
         if reference in DataTypeRange: