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Re: URI for abstract concepts (domain, host, origin, site, etc.)

From: Martin J. Dürst <duerst@it.aoyama.ac.jp>
Date: Sun, 28 Jun 2009 17:04:04 +0900
Message-ID: <4A4723F4.2030807@it.aoyama.ac.jp>
To: Xiaoshu Wang <wangxiao@musc.edu>
CC: Dan Brickley <danbri@danbri.org>, Larry Masinter <LMM@acm.org>, "'Pat Hayes'" <phayes@ihmc.us>, "'Eran Hammer-Lahav'" <eran@hueniverse.com>, "'Dan Connolly'" <connolly@w3.org>, "apps-discuss@ietf.org" <apps-discuss@ietf.org>, "www-tag@w3.org" <www-tag@w3.org>, "'URI'" <uri@w3.org>

On 2009/06/27 3:36, Xiaoshu Wang wrote:

> Thus,
> "http://danbri.org/foaf.rdf#danbri" denotes a person.
> "http://danbri.org/foaf.rdf#(application/rdf+xml)danbri" denotes an RDF
> node.
> "http://danbri.org/foaf.rdf#(application/xhtml+xml)danbri" denotes an
> HTML element ided "danbri

I don't understand this. Why wouldn't I just use
or anything similar for HTML fragments? (I'm assuming that foaf.rdf 
returns an application/rdf+xml documend, and foo.html returns an 
application/xhtml+xml document; the extensions may be meaningless to the 
protocol but help to keep things apart for humans and computers.)

Also, I don't see much of a need to denote an RDF node per se. I'm sure 
there are special applications one can come up with where reasoning 
about RDF nodes per se is helpful/necessary/whatever, but for such 
cases, there are other techniques available already. A single special 
property and blank nodes would do the job.

Regards,   Martin.

> When a URI owner uses content negotiation, they should make the content
> of each representation consistent. Of course, there could be
> inconsistencies if a user is not careful. But it is no different from
> the case when someonelse makes an inconsistent statement about
> "http://danbri.org/foaf.rdf#danbri". Inconsistent resources (whether it
> is caused by the same root-URI owner or not) will simply not be used
> (i.e., linked) by others, hence eventually die of isolation.
> This is the same old story from the httpRange-14. Once we straighten
> that out, all other problems are very easy to answer.
> Xiaoshu

#-# Martin J. Dürst, Professor, Aoyama Gakuin University
#-# http://www.sw.it.aoyama.ac.jp   mailto:duerst@it.aoyama.ac.jp
Received on Sunday, 28 June 2009 08:05:11 UTC

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