- From: Tom Adams <tom@tucanatech.com>
- Date: Fri, 3 Sep 2004 16:00:44 -0400
- 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. Support Engineer | Office: +1 703 871 5312 tom@tucanatech.com | Cell: +1 571 594 0847 http://www.tucanatech.com | Fax: +1 877 290 6687 ------------------------------------------------------
Received on Friday, 3 September 2004 20:00:46 UTC