ITS 2.0 with XLIFF

All

I'm hoping for some help in solving a validation problem with XLIFF+ITS 
2.0.

I am using the DITA-XLIFF Roundtrip tool to go DITA->XLIFF->Translation 
with ITS->DITA.

My translated XLIFF is attached with the schema files that are declared in 
the top of the XLIFF.

XML Validators keep returning an error about its:provenanceRecordsRef 
being an invalid attribute of trans-unit.

Can anyone see why?



Phil.

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