problem with msg-header-2_0.xsd

Hello, 

 

When I try to validate the following xsd or use the XSD to validate an xml message I get an error.

http://www.oasis-open.org/committees/ebxml-msg/schema/msg-header-2_0.xsd

 

--------------------

The content model of complex type definition '{anonymous}' is ambigious.

                             Error location: schema / element / complexType

                             Details

                                                          cos-nonambig: <:any namespace='##other'> makes the content model non-deterministic against <:element name='Reference'>. Possible causes: name equality,
 overlapping occurrence or substitution groups.

 

Can you help?

 

Thanks

 

Joe

 

 

 

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