test case: is RDF/XML layered on XML?

This is one of many possible test cases to clarify whether RDF/XML is 
really layered on XML, and we whether we expect standard XML processing to 
apply:

RDF/XML

<?xml version="1.0"?>
<!DOCTYPE rdf:RDF [
   <!ENTITY test   "Some test text">]>

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
          xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
   <rdf:Description>
     <rdfs:label>&test;</rdfs:labelL>
   </rdf:Description>
</rdf:RDF>

N-TRIPLES

  _:a <http://www.w3.org/2000/01/rdf-schema#label> "Some test text" .

Yes/No?

Brian