W3C home > Mailing lists > Public > www-tag@w3.org > January 2003

RE: TAG request: establish the relationship between URIs and Resources is many to many

From: David Orchard <dorchard@bea.com>
Date: Fri, 24 Jan 2003 11:05:40 -0800
To: "'Bill de hÓra'" <dehora@eircom.net>, "'Tim Bray'" <tbray@textuality.com>
Cc: <www-tag@w3.org>
Message-ID: <016001c2c3e5$5af75180$2600a8c0@beasys.com>

While I can't nearly track the emails and depth of this debate, this seems
like a fairly reasonable way to proceed.  Yet again, congrats to TimB for
seeing the difference between principles and practice, and suggesting a way
forward.

cheers,
dave

> -----Original Message-----
> From: www-tag-request@w3.org
> [mailto:www-tag-request@w3.org]On Behalf Of
> Bill de hÓra
> Sent: Thursday, January 23, 2003 10:06 AM
> To: Tim Bray
> Cc: www-tag@w3.org
> Subject: Re: TAG request: establish the relationship between URIs and
> Resources is many to many
>
>
>
> Tim Bray wrote:
>
> > How about a slight recasting of that:
> >
> > 1. Different URIs can identify the same resource, in the
> opinion of the
> > creators and users of that resource.
> > 2. The Web is designed on the principle that a single URI
> identifies a
> > single resource which does not change.  In practice, this
> principle is
> > someties violated (insert list of nasty examples), and
> software must
> > often deal with the consequences, but such inconsistency is always
> > damaging and SHOULD be avoided.  -Tim
>
> Clearer, thanks. But abuse of this principle also affects
> specifications such as RDF, as well as web software. For example it
> will mean we have to merge RDF graphs with great caution before
> inferences can be made and we have to be careful about RDF queries
> that span multiple graphs.
>
> If the rdf-wg were happy to add words to the primer about how
> breaking this principle interplays with the function that determines
> the denotation of a URI, that would help greatly. That is, when
> merging two RDF graphs, be aware that a URI  used in graph 1 might
> not have the same denotation as it does in graph 2.
>
> Bill de hÓra
>
>
>
Received on Friday, 24 January 2003 15:17:10 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 26 April 2012 12:47:15 GMT