diff --git a/Namespaces.py b/Namespaces.py
index 591f4e8..cc05b1e 100755
--- a/Namespaces.py
+++ b/Namespaces.py
@@ -14,9 +14,11 @@ except:
         XSD1        = "http://www.w3.org/1999/XMLSchema"
         XSD2        = "http://www.w3.org/2000/10/XMLSchema"
         XSD3        = "http://www.w3.org/2001/XMLSchema"
+        XSD_LIST    = [ XSD1, XSD2, XSD3 ]
         XSI1        = "http://www.w3.org/1999/XMLSchema-instance"
         XSI2        = "http://www.w3.org/2000/10/XMLSchema-instance"
         XSI3        = "http://www.w3.org/2001/XMLSchema-instance"
+        XSI_LIST    = [ XSI1, XSI2, XSI3 ]
         BASE        = XSD3
 
     class WSDL: