rq23 & protocol spec?

Andy & Eric,

I think that rq23 should at least refer to the ability to specify an RDF
dataset in the SPARQL protocol (and, further, to at least point to the
section in SPROT about resolving ambiguous datasets). I think that would
make the protocol doc a normative reference.

The coupling between these two should be very loose, but I think it's too
lose currently. At the very minimum it should say something like "See
[SPROT] for more information about RDF datasets" *somewhere* in the query
language spec.

If it already says this, please forgive me, and a pointer to where would be
nice. I couldn't find anything.

Cheers,
Kendall Clark