N-Triples MIME type should not be text/plain -- comment on RDF Test Cases.

Comment on "RDF Test Cases".
W3C Recommendation 10 February 2004
  In http://www.w3.org/TR/rdf-testcases/#ntriples it says,

The Internet media type / MIME type of N-Triples is text/plain and  
the character encoding is 7-bit US-ASCII.

This is a bug, I think.   It  prevents crawlers from absorbing the  
file and indexing it proerly, it will prevent the file from being  
dispatched inside a data browser to a data-handling view, and so on.

I would suggest   text/rdf+n3   if the assumption is correct that  
NTriples is a subset of N3.
Otherwise I suppose text/rdf+nt or something would be logical.  
Anotehr possibility would be
text/rdf=n3; level=nt
introducing a level parameter to explain what level of N3 was being  
used.

Tim BL