- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Sat, 07 Jul 2007 22:26:30 -0400
- CC: Linking Open Data <linking-open-data@simile.mit.edu>, www-tag@w3.org, semantic-web@w3.org
Kingsley Idehen wrote: >> > Depends on the characteristics of the property "owl:sameAs" as used in > Tim's "Universe of Discourse" (Data Space) and here is why: > > Yes, if in Tim's Data Space Definition he asserts that "owl:sameAs" is > an "owl:SymmetricProperty" then his usage is unambiguous, as this > should result in identical triples when you SPARQL against his Data > Space using either URI (assuming we are not modeling the Web as a > single Graph). Of course, this assumes the SPARQL processor has > inference capabilities. Otherwise, "rdfs:seeAlso" would be the > preferred property as this is unambiguous (i.e. the aforementioned > URIs will produce varied Triples without introducing confusion). In retrospect, the statement above is *incorrect* since "owl:sameAs" means the URIs in the Domain and Range are to be treated as "Identical". It's up to RDF Clients / Consumers (e.g. Browsers and SPARQL Processors) to ensure that identical Triples are dereferenced from said URIs. Thus, Tim's usage is unambiguous :-) -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President & CEO OpenLink Software Web: http://www.openlinksw.com
Received on Sunday, 8 July 2007 02:26:41 UTC