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Fwd: namespace versioning (Dublin Core) use case for DAWG?

From: Tom Adams <tom@tucanatech.com>
Date: Fri, 3 Sep 2004 16:00:44 -0400
Message-Id: <F0EF5E9F-FDE3-11D8-B8C3-000A95C9112A@tucanatech.com>
To: DAWG public list <public-rdf-dawg@w3.org>

 From the comments list for our perusal.



Begin forwarded message:

> Resent-From: public-rdf-dawg-comments@w3.org
> From: Dan Brickley <danbri@w3.org>
> Date: 3 September 2004 1:35:02 PM
> To: public-rdf-dawg-comments@w3.org
> Cc: public-swbp-wg@w3.org
> Subject: namespace versioning (Dublin Core) use case for DAWG?
>
>
> (sent to DAWG feedback list, cc: Best Practices WG)
>
> Hi
>
> Apologies if this is already covered and I missed it.
>
> I'd like DAWG to consider a use case in which a client application 
> wants
> all the "Dublin Core titles and descriptions" of some object, eg.
> Danbri's weblog(s), and doesn't care at all which concrete Dublin Core
> namespace is used.
>
> ie.
> 	http://purl.org/dc/elements/1.0/
> 	http://purl.org/dc/elements/1.1/
>
> This is a practical issue w/ DC deployment. I'm ignoring for now the
> additional mess around upper/lowercase. Assume that we see dc10:title
> and dc11:title in data, that the semantics are pretty much the same but
> that the schemas aren't explicitly/formally mapped using RDFS or OWL
> constructs.
>
> A couple of approaches leap to mind: 'or'ing, vs. query-specific
> assumptions, ie. allowing the query to say "Well, let's temporarily
> assume that dc1:title is a subproperty of dc2:title and vice-versa,
> ...".
>
> Both approaches have their issues (eg. 'or'ing both dc:title and
> dc:description in a larger query might be hairy),
> but my sense is that there is a real problem when similar
> namespaces where new URIs have been assigned
> despite modest differences in meaning. If DAWG ends up deciding not to
> create technology that soothes these issues, the Best Practices WG 
> might
> consider making reference to querying issues when it discusses best
> practice for Vocabulary Management and versioning.
>
> cheers,
>
> Dan
>
> ps. Eric P, perhaps you could comment on how this is dealt with in
> Annotea's treatment of Dublin Core 1.0 vs 1.1?
>
>
-- 
Tom Adams                  | Tucana Technologies, Inc.
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tom@tucanatech.com         |     Cell: +1 571 594 0847
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Received on Friday, 3 September 2004 20:00:46 GMT

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