Schema problem refrerring to en external document as signature input

Hi all, I just took advantage of traveling time to add new test cases to our dss suite.
I want to create a signature on a referenced document with a request element like this: <dss:SignRequest xmlns:dss= urn:oasis:names:tc:dss:1.0:core:schema > <dss:OptionalInputs> <dss:SignatureType>urn:ietf:rfc:3275</dss:SignatureType> </dss:OptionalInputs> <dss:InputDocuments> <dss:Document ID= ExtDocId RefURI= localhost:8080/trustApp/sig/static/dssTest/testDocument.xml /> </dss:InputDocuments> </dss:SignRequest> But this breaks the schema as the Document elements needs some child object ...
Did I built a broken request?
Or did we miss the case of signing an externally referenceable document?
Greetings, Andreas

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