W3C home > Mailing lists > Public > xml-uri@w3.org > September 2000

Re: Fwd: I-D ACTION:draft-daigle-uri-std-00.txt

From: John Cowan <jcowan@reutershealth.com>
Date: Thu, 07 Sep 2000 12:31:35 -0400
Message-ID: <39B7C2E7.21FF5BA4@reutershealth.com>
To: Miles Sabin <msabin@cromwellmedia.co.uk>, "xml-uri@w3.org" <xml-uri@w3.org>
Miles Sabin wrote:

> But Simon, that's a pretty tall order, because there's no
> end to the number of distinct resources a URL (nb. UR*L*) might
> locate.

Or distinct entity bodies, anyhow.  Actually, it's a many-to-many
situation:

	a single URL can return many different entity bodies
	(time-sensitive, content negotiation, etc.);

	two different URLs may return the same entity body.


Officially, every distinct URL represents a distinct resource.
(Absolute and corresponding relative URLs are not distinct URLs in this sense.)
My personal view is that whether two distinct URLs represent one or
two resources depends on the owner(s) of the resource(s), who can use RDF
to publish an equivalence relation.

The situation with URNs is no different.  The paradigm case of URNs
is ISBNs, and it's up to the publisher whether a new edition merits
a new ISBN or not.  A single URN is definitely not bound to a single
entity body.

-- 
There is / one art                   || John Cowan <jcowan@reutershealth.com>
no more / no less                    || http://www.reutershealth.com
to do / all things                   || http://www.ccil.org/~cowan
with art- / lessness                 \\ -- Piet Hein
Received on Thursday, 7 September 2000 12:31:36 GMT

This archive was generated by hypermail 2.2.0 + w3c-0.30 : Tuesday, 12 April 2005 12:17:25 GMT