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RE: article on URIs, is this material that can be used by the SWEO IG?

From: Marc de Graauw <marc@marcdegraauw.com>
Date: Wed, 6 Jun 2007 15:52:32 +0200
To: "'Ed Davies'" <edavies@nildram.co.uk>
Cc: <www-tag@w3.org>
Message-ID: <005c01c7a841$ef68ec80$8a00a8c0@MARCNOTE>

Ed Davies:

| Marc de Graauw wrote:
| > ...
| > On a side note, in fact the 303 solution is not that 
| different from subject
| > identifiers. Both assert whether a URI refers to an 
| information resource or
| > not. In the XML serialization of Topic Maps, if a URI refers to an
| > information resource it is embedded in a <resourceRef> 
| element, otherwise in
| > a <subjectIndicatorRef> element. So, tweaking the Topic Map 
| definitions a
| > bit, it would be fair to say a 303 response means the 
| dereferenced URI is a
| > subject indicator ...
| 
| It doesn't follow that the destination of a 303 has a
| specific topic so <subjectIndicatorRef> is not
| equivalent.
| 
| Using the examples from the httpRange-14 draft finding
| you could have these URIs
| 
|    http://example.com/ontology/meter
|    http://example.com/ontology/kilogram
|    http://example.com/ontology/watt
| 
| all 303 to
| 
|    http://example.com/ontology/SI/Information
| 
| which then provides RDF and/or HTML descriptions of
| hundreds of SI units, no one of which can be said to
| be the primary topic of the resource.

Not quite.

If
http://example.com/ontology/meter
http://example.com/ontology/kilogram
http://example.com/ontology/watt
all 303 to the same information resource, they still identify three
different resources, namely the meter, the kilogram and the Watt.

What exactly the 303 points to isn't essential for using the URI to identify
a (non-information) resource, likewise what the document a
<subjectIndicatorRef> points to contains isn't essential either. It may
contain sensible stuff, or nonsense, but this wouldn't change the fact that
http://example.com/ontology/meter is used as an identifier for the meter. 

Marc de Graauw

www.marcdegraauw.com
Received on Wednesday, 6 June 2007 13:52:35 UTC

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