RE: does RDF require understanding all 82 URI schemes?

: At the present time, the XML language specifications do not
: endorse any use of a namespace URI other than string
: comparison with other namespace URIs.  The RDF designers
: asserted from the beginning that we wanted to use URIs to
: their fullest , not just as strings to be compared.  That is, RDF
: _expects_ that any URI can be presented to the Web for resolution.
: But RDF still treats URIs as "opaque" in the sense that RDF does
: not require any parsing of the URI.

That sounds like a hedge.

Bill de hOra