- From: Henry Story <henry.story@bblfish.net>
- Date: Mon, 20 Sep 2004 15:29:02 +0200
- To: www-rdf-interest@w3.org
- Cc: h.halpin@ed.ac.uk, ht@inf.ed.ac.uk
I have just come across a very well written paper by Harry Halpin and Henry S. Thompson called "Web Proper Names: Naming Referents on the Web" [1]. I don't feel comfortable with the proposed solution to the problem, but I do feel he has described the problem itself very well, and given a very good summary of the philosophical debate behind it. In particular the use/mention distinction has really helped locate a problem that has kept bugging me when thinking about rdf. This can be summarized by considering the following triples which though formally contradictory, can in fact be seen to be compatible: (A) http://www.paris.org/Monuments/Eiffel http://purl.org/dc/elements/1.1/creator http://www.gustaveeiffel.com/ (B) http://www.paris.org/Monuments/Eiffel http://purl.org/dc/elements/1.1/creator http://www.endex.com/gf/ If we only understand the above names to be used then the two sentences are contradictory. (A) states that the Eiffel Tower was created by Gustav Eiffel, whereas (B) states that it was created by Gary Feuerstein. (A) is true in this interpretation, whereas (B) is false. But we can guess that what was probably intended by (B) was not that <http://www.paris.org/Monuments/Eiffel> refer to the Eiffel Tower, but that it refer to the Web Page which refers to the Eiffel Tower, whereas in the first sentence we have the intuition that it refers to the actual building located in Paris. Harry's solution is to assume that rdf resources by default point to the representation of the resource and not the thing itself, and then to add a new wpn:// scheme to help create names that refer directly to an object. It occurs to me right now that from a philosophical perspective this cannot quite be the correct solution, since the arguments have always been that names can be used in both ways. So whatever naming scheme one comes up with the problem of which way they are being used will exist. Would it perhaps not be easier to extend RDF so that one can point to a resource in either way, for example by allowing the following: <Entry rdf:about="http://www.paris.org/Monuments/Eiffel"> or <Entry rdf:refers="http://www.paris.org/Monuments/Eiffel"> I have been confused a few times about this exact problem, and am very thankful to Harry Halpin, and Henry S.Thompson for the clear explanation of this problem. Sincerely, Yet another Henry Henry Story http://bblfish.net/ [1] http://www.cogsci.ed.ac.uk/~ht/webpropernames/
Received on Monday, 20 September 2004 13:29:09 UTC