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Re: What is the URI of Truth?

From: Pierre-Antoine CHAMPIN <champin@bat710.univ-lyon1.fr>
Date: 11 Jun 2001 11:13:29 +0200
To: Sean "B." Palmer <sean@mysterylights.com>
Cc: www-rdf-interest@w3.org
Message-Id: <992250811.1495.0.camel@lisiperso3>
On 08 Jun 2001 17:31:25 +0100, Sean B. Palmer wrote:
> I don't particularly agree that it is a
> critical apect of the SW to be able to define non-ambiguous interplay
> between different namespacing mechanisms,

I'm not sure I get your point here:
You seem to distinguish XML-namespaces from RDF-namespaces.

I do not know what *a* RDF-namespace is : RDF only knows of *one*
namespace : URIs.

A problem with XML-namespaces is that are not part of the URI-space, but
rather of the a space which elements are <uri, xml-name> pairs. Hence
the mapping-by-concatenation issue.
This problem is proper to the RDF 1.0 XML syntax, because it needs to
convert Qnames to URIs. I agree it is not critical to the SW.

Another problem with XML-namespaces is that, in current practice, their
is a semantical ambiguity with the URI identifying them (can an http:
URI identify a namespace ?).
This problem, IMHO, is critical in many respects, since it raises
questions about the semantics of URIs. There is no "interplay between
different namespacing mechanisms" as you wrote: URIs are the global
namespace of the SW.

  Pierre-Antoine
Received on Monday, 11 June 2001 05:12:18 GMT

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