W3C home > Mailing lists > Public > www-rdf-interest@w3.org > June 2001

RE: What is the URI of Truth?

From: Jonathan Borden <jborden@mediaone.net>
Date: Mon, 11 Jun 2001 06:31:52 -0400
To: "Pierre-Antoine CHAMPIN" <champin@bat710.univ-lyon1.fr>, "Sean B. Palmer" <sean@mysterylights.com>
Cc: <www-rdf-interest@w3.org>
Message-ID: <002601c0f261$badf9be0$0201a8c0@ne.mediaone.net>
Pierre-Antoine CHAMPIN wrote:

> 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.

Certainly an "http:" URI can identify a namespace, most namespace names in
common usage are http: prefixed. This distinction between URNs and URLs is
somewhat historical. A URI is more that the mere encapsulation of URLs and
URNs into a single specification: a URI prefixed with the http: scheme may
be used as a name. Similarly URIs prefixed with the "urn:" scheme may be

XML and XML applications see no "semantic ambiguity". The only ambiguity I
see is that which is attached by humans trying to read the tea leaves.

Received on Monday, 11 June 2001 06:33:33 UTC

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