RDF Model Syntax: Tar file is only symlinks. Completely useless, as I don’t have the files there, otherwise I wouldn’t've downloaded the tarball! Several of the files include HTML: ms_7.7 seem to exhibit this. I’m not sure if these are supposed to be some kind of RDF-in-HTML example though, so I’m not sure if this is by design.

Seems much more likely you were thinking of the test cases linked from http://www.w3.org/2000/10/rdf-tests/rdfcore/ (an unlinked subdirectory from the one you gave, as far as I can see). There’s a lot of tests there though, and I’m not the kind of guy that runs a test suite very often.

The real person to ask that question to would be dajobe: the “validator” is just running the RDF/XML parser over the given URI. I’m pretty sure that his parser conforms to all the test cases, but he’d really be the one to ask, although I’m not completely sure the question isn’t already answered on Redland’s Home Page somewhere.