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RE: URIQA thwarted by context problems? (NOT)

From: <Patrick.Stickler@nokia.com>
Date: Mon, 11 Oct 2004 15:20:09 +0300
Message-ID: <1E4A0AC134884349A21955574A90A7A56471A7@trebe051.ntc.nokia.com>
To: <r.newman@reading.ac.uk>, <www-rdf-interest@w3.org>



> -----Original Message-----
> From: www-rdf-interest-request@w3.org
> [mailto:www-rdf-interest-request@w3.org]On Behalf Of ext 
> Richard Newman
> Sent: 11 October, 2004 15:10
> To: RDF interest group
> Subject: Re: URIQA thwarted by context problems? (NOT)
> 
> 
> 
> To qualify this further: subPropertyOf means _exactly_:
> 
> x p y
> p subPropertyOf r
> =======
> x r y
> 
> so finding the dc:title statement in the example doesn't 
> strictly allow 
> the agent to treat /foo/bar/bas as title --- it actually introduces a 
> new triple (or several!) into the agent's world, which could produce 
> useful behaviour as a side-effect.
> 
> The agent can't directly handle /foo/bar/bas --- that's where the 
> human/context/etc. stuff comes in. However, it can make use of the 
> surrounding knowledge, that it already understands, to do 
> useful stuff, 
> which is what I think Patrick is getting at.

Right. By saying "treating the value as a title" I had glossed
over a presumption that the agent would infer new triples
based on the rdfs:subPropertyOf relation, as you show above.

The end result is that for any statement

   _:x <http://example.com/foo/bar/bas> "Blargh" .

one could infer

   _:x dc:title "Blargh" .

and thus treat the value (object of the first statement) as a title.


> 
> As long as people remember that _at some point_, a human being has to 
> tell a tool what to do with triples that it finds, things will 
> typically work out. Inference can push this point further 
> back, or push 
> it onto another point where the work has already been done (which is 
> ontology mapping), but it can't get rid of it completely. 
> It's the ol' 
> Chinese Room --- meaningless without the observers.

Right.

Patrick


> -R
> 
> On Oct 10, 2004, at 08:20, <Patrick.Stickler@nokia.com> wrote:
> > and in the CBD provided it finds the statement
> >
> >    http://example.com/foo/bar/bas
> >       rdf:subPropertyOf
> >          dc:title .
> >
> > and it knows how to interpret the dc:title property,
> > then it should be acceptable to treat any values of
> >
> >    http://example.com/foo/bar/bas
> >
> > exactly the same as any values of dc:title, and the agent
> > is then able to do something useful with the knowledge it
> > has encountered, even though at first it did not understand
> > all the terms used to express that knowledge.
> 
> <SNIP>
> 
> > True, there may be "local" meaning and usage associated with
> > the term
> >
> >    http://example.com/foo/bar/bas
> >
> > which some arbitrary agent may not be able to take full
> > advantage of -- and fully dynamic interaction between
> 
> 
> 
Received on Monday, 11 October 2004 12:22:19 GMT

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