- From: Booth, David (HP Software - Boston) <dbooth@hp.com>
- Date: Wed, 5 Nov 2008 20:24:24 +0000
- To: Pierre-Antoine Champin <swlists-040405@champin.net>, Peter Ansell <ansell.peter@gmail.com>
- CC: Semantic Web <semantic-web@w3.org>
> From: Pierre-Antoine Champin > > http://www.w3.org/2006/link#obsoletes does indeed raise problems: > according to its comment, "[The terms] are synonymous, but subject is > preferred to the object. Logically similar to owl:sameAs, but not > symmetric." > > I'm not sure what "logically similar" implies, but if the terms are > synonymous, then > :a link:obsoletes :b . > should imply > :b link:obsoletes :a . > which makes link:obsoletes defacto symetrical. > > In fact, links:obsoletes obviously applies to *the URI* of > the resource rather than the resource itself, so David's second proposal > sounds more appropriate. Unfortunately, it is not valid RDF... Yes, if there were one simple thing I could change about the RDF specification it would be to remove that silly prohibition against having a literal as the subject of an assertion. > > A possible solution seems to rather use subproperties of > http://www.w3.org/2006/link#uri , e.g. :obsoleteUri and :preferedUri, > all ranging to xsd:anyURI . I like the idea of :obsoleteUri, presumably to be used like this: <http://example/new-term> :obsoleteUri "http://example/old-term"^^xsd:anyURI . which would mean the exact same thing as: <http://example/old-term> :obsoleteUri "http://example/old-term"^^xsd:anyURI . because <http://example/old-term> owl:sameAs <http://example/new-term> . The semantics would be clean. However, I do not think :preferredUri would work very well, because it seems non-monotonic: the URI that is preferred today may not be the URI that is preferred tomorrow. David Booth, Ph.D. HP Software +1 617 629 8881 office | dbooth@hp.com http://www.hp.com/go/software Statements made herein represent the views of the author and do not necessarily represent the official views of HP unless explicitly so stated.
Received on Wednesday, 5 November 2008 20:26:02 UTC