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Re: more about dereference (notes from MIT post F2F2-day-1)

From: Sandro Hawke <sandro@w3.org>
Date: Thu, 13 Oct 2011 07:37:17 -0400
To: Pat Hayes <phayes@ihmc.us>
Cc: public-rdf-wg <public-rdf-wg@w3.org>
Message-ID: <1318505837.25065.84.camel@waldron>
On Wed, 2011-10-12 at 22:58 -0500, Pat Hayes wrote:
> Actually, I want to subtly change (1).
> 
> On Oct 12, 2011, at 4:04 PM, Sandro Hawke wrote:
> 
> > Some of us kept talking for a few more hours.    Everyone was
> > more-or-less cool with these observations about dereference:
> > 
> > 1. If a system successfully dereferences URL "L" and obtains a
> > representation of an RDF graph, then <L> is a GraphContainer.
> 
> That seems like http-range-14 wearing a Hawaiian shirt. 
> 
> >  That
> > is, "L" denotes a GraphContainer.  Logically, GraphContainer is
> > disjoint from foaf:Person (I think!!) so a document that includes "<>
> > a foaf:Person" is (by this proposal) logically inconsistent with it
> > being served on the Web.
> 
> No, its not *logically* inconsistent. What it implies is that there is something in the intersection of foaf:Person and GraphContainer. But these being disjoint has to be part of an ontology of GraphContainers rather than a *logical* axiom, I suggest. That is, we don't build this into the very semantics. 

Agreed.  I would leave this up to, for instance, the people providing an
ontology for foaf:Person to say it's disjoint from GraphContainer.

     -- Sandro

> Pat
> 
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Received on Thursday, 13 October 2011 13:41:32 GMT

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