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Re: [httpRange-14]: New Draft Finding "Dereferencing HTTP URIs"

From: Leo Sauermann <leo.sauermann@dfki.de>
Date: Mon, 04 Jun 2007 12:04:15 +0200
Message-ID: <4663E39F.7060207@dfki.de>
To: Ed Davies <edavies@nildram.co.uk>
CC: www-tag@w3.org, "Williams, Stuart (HP Labs, Bristol)" <skw@hp.com>

Hi Ed, Tag,

It was Ed Davies who said at the right time 01.06.2007 11:45 the 
following words:
> Would it be a fair summary of this finding to say that
> a 303 response to an attempt to access someURI with a
> location field set to someOtherURI and the assertion:
> <someURI>
>   <http://www.w3.org/2000/01/rdf-schema#seeAlso>
>     <someOtherURI> .
> are equivalent?
> After all, "See Other" and "seeAlso" look pretty similar.
looking Up seeAlso:
"Further information about the subject resource."

That is semantically true, but not precise enough. seeAlso links can be 
used to link across any RDF documents on the web that describe the same 
resource. The relation between <someURI> and the 303 redirect to 
<someOtherURI> (which would then be a html or rdf description of 
<someURI>) is more specialized than seeAlso. Because the site admin of 
someURI can only redirect to ONE such someOtherURI, the someOtherURI has 
a special meaning of being "I, the domain holder, think the best 
description of <someURI>".

We could raise seeAlso into this more specific relation, but I would 
rather go with (what also Dan Brickley has brought up in [2])
foaf:isPrimaryTopicOf. Or my own pimo:occurrenceRef, or SKOS' 
http://www.w3.org/2004/02/skos/core#isPrimarySubjectOf .

And I would hope to raise isPrimaryTopicOf/isPrimarySubjectOf as an 
extension into the RDFS or RDF vocab, as it is rather important across 
many applications on top of rdf. (otherwise, foaf and skos and many 
heretics like me need to fight it out).

> If that's a reasonable way to look at it, why not make
> them formally equivalent?  I.e., describe the equivalence
> in the finding.  rdfs:seeAlso doesn't have much meaning
> anyway but it might be helpful if many people stored
> these responses in the same way.
> Ed Davies.
I think the difference is that seeAlso can and should have MANY links in 
the semantic web (=many opinions about the same subject) whereas 
isPrimaryTopicOf is the "description published by the domain holder", 
more authority.

seeAlso the sindice service setup by Giovanni Tummarello and Eyal Oren 
to get a picture of what a seeAlso can do for you:


[2] http://www.w3.org/mid/46609153.4040603@danbri.org

DI Leo Sauermann       http://www.dfki.de/~sauermann 

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Received on Monday, 4 June 2007 10:24:27 UTC

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