- From: Sandro Hawke <sandro@w3.org>
- Date: Wed, 01 Jan 2003 21:54:03 -0500
- To: Dan Connolly <connolly@w3.org>
- cc: www-archive@w3.org
> On Tue, 2002-12-31 at 12:35, Sandro Hawke wrote: > > Let's call this odd > > hybrid approach #89. > > What's odd about it? It's clearly the way the Web > works, and consistent with all the specs (RDF, HTTP, > HTML, not sure about XLink/XPointer) as written, no? It's how the works in an informal, human way, but it doesn't seem amenable to machine processing. To rephrase, approach #89 says that the denotation of an http URI or URI-Reference is EITHER a living-document-like-thing (a maintainable collection of information) or a domain-of-discourse thing which is the subject (apparent and/or intended -- that's another issue) of the document-like-thing. Consider the RDF graph _:sandro n1:likes <http://www.w3.org/Consortium/> and assume you know that _:sandro is me. You don't know if it's saying I have the "n1:likes" relationship with the web page or with the consortium. But then the schema for n1:likes tells you its range is web pages, so now you know. But then you come across _:eric n2:likes <http://www.w3.org/Consortium/> and the range of n2:likes is organizations. Organizatons and web pages are disjoint in my ontology, so we have a contradiction. To generalize, any RDF graph which tries to use the URI as both a subject identifier and a page identifier (with non-trivial ontologies for each) will be inconsistent. This is likely to occur in lots of real systems, especially as graphs are merged unpredictably. Do you see a way out of this? -- sandro
Received on Wednesday, 1 January 2003 21:58:12 UTC