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RE: Some TAG review of "Cool URIs for the Semantic Web"

From: Williams, Stuart (HP Labs, Bristol) <skw@hp.com>
Date: Fri, 28 Sep 2007 14:06:59 +0100
Message-ID: <C4B3FB61F7970A4391A5C10BAA1C3F0DE1530B@sdcexc04.emea.cpqcorp.net>
To: "Pat Hayes" <phayes@ihmc.us>, "Dan Connolly" <connolly@w3.org>
Cc: "Tim Berners-Lee" <timbl@w3.org>, "Technical Architecture Group WG" <www-tag@w3.org>, "Susie Stephens" <susie.stephens@gmail.com>

> -----Original Message-----
> From: www-tag-request@w3.org [mailto:www-tag-request@w3.org] 
> On Behalf Of Pat Hayes
> Sent: 27 September 2007 21:13
> To: Dan Connolly
> Cc: Tim Berners-Lee; Technical Architecture Group WG; Susie Stephens
> Subject: Re: Some TAG review of "Cool URIs for the Semantic Web"


> Well, Im not entirely sure about HTTP endpoint either, 
> because Im not savvy enough with the Web-architecture details 
> to know if this is really appropriate: maybe its something 
> just the other side of the http endpoint, if that latter is 
> more like the server.  But the key point is that the 
> distinction has to do with whether it can be
> *accessed* by transfer protocols, rather than with the way it 
> can be encoded or represented. The essential characteristics 
> of a billboard can be conveyed in an image, but if the image 
> has never been digitized then its not an information resource 
> (yet). 

FWIW, the wording of the TAG/webarch defn of 'information resource'
arose during our meeting in Basel [1].

Earlier attempts to offer the term "Web resource"  for things that
respond with 200 and a representation [2] failed on ground which now
escape me.

The thing that I recall about the "essentail characteristics being
conveyable in a message" definition was that it was about the
*potential* of such conveyance rather that the actuality of it. The
notion was, IIRC, intended to be about some Shannoesque notion of
information content rather than the fact or otherwise of a 200 response
when using a particular transfer protocol. 

I mention this here because there seems to be a tendency in these
threads to offer a definition whereby "information resources" are just
those which in fact respond to an http request with a 200 response code
- whereas the TAG definition was intended to be broader - anything whose
essential nature is information.

So, wrt to the billboard poster that you mention above, the image on the
poster would 'fit' the definition whereas the poster itself might not -
having a mass, being made of some material that will deteriorate over a
few weeks;

[1] http://www.w3.org/2001/tag/2004/10/05-07-tag#infores234


> Pat
> >
> >
> >--
> >Dan Connolly, W3C http://www.w3.org/People/Connolly/

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Received on Friday, 28 September 2007 13:11:17 UTC

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