W3C home > Mailing lists > Public > www-rdf-interest@w3.org > August 2007

Re: What if an URI also is a URL

From: Reto Bachmann-Gmür <rbg@talis.com>
Date: Mon, 27 Aug 2007 20:37:18 +0200
Message-ID: <46D319DE.9000804@talis.com>
To: Oskar Welzl <lists@welzl.info>
CC: www-rdf-interest@w3.org

Oskar Welzl wrote:
> [...]
> c) Consequently, if I want to make a reference to my weblog (meaning the
> thing as such, a collection of all posts, pictures, the services offered
> etc.), I'd better not use http://oskar.twoday.net as this would only
> refer to one single HTML-document. In particular, the document served at
> http://oskar.twoday.net might have been dc:created yesterday, while the
> weblog as such started 2003.
> I'd have to make up something like http://oskar.twoday.net/id/thisblog
> and maybe state somewhere that http://oskar.twoday.net/id/thisblog has
> an indexDocument http://oskar.twoday.net 
I think there might be a confusion between the resource
<http://oskar.twoday.net/> and the representation returned by the
webserver. A Blog is an Information Resource which could be described as
an ordered collection of posts, the HTML returned by the webserver is
(or should be) a suitable representation of that thing. Depending on the
current time as well as the properties of the request the server may
deliver different representations of an invariable resource.
> d) http://www.some.org can not be used to make statements about the URI
> as such, like "contains 3 vowels" or "is valid according to some spec".
Right, if you want a node representing the URI you can use a literal
such as in:

[ owl:sameAs "http://www.some.org"^^xsd:anyURI;
   dc:comment "contains 3 vowels"]


Reto Bachmann-Gmür
Talis Information Limited

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Received on Monday, 27 August 2007 18:37:56 UTC

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