- From: David Booth <david@dbooth.org>
- Date: Fri, 18 Mar 2011 15:58:29 -0400
- To: nathan@webr3.org
- Cc: Kjetil Kjernsmo <kjekje@ifi.uio.no>, Tim Berners-Lee <timbl@w3.org>, SW-forum Web <semantic-web@w3.org>
On Fri, 2011-03-18 at 18:55 +0000, Nathan wrote: > Kjetil Kjernsmo wrote: [ . . . ] > > Can something be both a foaf:PersonalProfileDocument and > > an RDF Graph? (my intuition says no). > > Nope. Careful. That's only true in a graph in which those classes have been declared disjoint. This particular example is all the more confusing because Kjetil has used RDF Graphs as one of the classes in the example. So to avoid that confusion, let me rephrase the question substituting "red lightbulbs" for "RDF Graphs": >> Can something be both a foaf:PersonalProfileDocument and > > a red lightbulb? (my intuition says no). In a given graph g, a URI u can perfectly well (ambiguously) identify something that is both a foaf:PersonalProfileDocument and a red lightbulb, provided that g has no disjointness or other such predicates that would prevent it from being so. You need to know what graph you are asking about, and what assertions it contains, to answer the question. -- David Booth, Ph.D. http://dbooth.org/ Opinions expressed herein are those of the author and do not necessarily reflect those of his employer.
Received on Friday, 18 March 2011 19:58:58 UTC