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Re: reification test case

From: Patrick Stickler <patrick.stickler@nokia.com>
Date: Tue, 05 Feb 2002 11:28:23 +0200
To: Pat Hayes <phayes@ai.uwf.edu>
CC: RDF Core <w3c-rdfcore-wg@w3.org>
Message-ID: <B8857257.D3A1%patrick.stickler@nokia.com>
On 2002-02-05 3:09, "ext Pat Hayes" <phayes@ai.uwf.edu> wrote:

>> On 2002-02-04 18:50, "ext Dan Brickley" <danbri@w3.org> wrote:
>> 
>>>  On Mon, 4 Feb 2002, Patrick Stickler wrote:
>>> 
>>>>  On 2002-02-04 17:23, "ext Dan Connolly" <connolly@w3.org> wrote:
>>>> 
>>>>>  On Mon, 2002-02-04 at 07:12, Jeremy Carroll wrote:
>>>>>>  My vote: no.
>>>>> 
>>>>>  I vote yes.
>>>>> 
>>>>>  This is what "triple" means, after all, no?
>>>>>  if x=xx, y=yy, z=zz, then (x,y,z)=(xx,yy,zz), no?
>>>> 
>>>>  But a bNode of type rdf:Statement is not a triple, it
>>>>  is the reification of a triple to which can be added
>>>>  additional knowledge such as authority, source, scope,
>>>>  etc.
>>> 
>>>  shall we say it is a 'description of' a triple? (avoiding the
>>>  term 'reification' wherever possible strikes me as a useful strategy,
>>>  at least while we're discussing rdf:Statement...)
>>> 
>>>  compare this to a 'description of' a Book, or a person, or any other type
>>>  of thing whose instances might be described using bNodes in an RDF graph.
>>>  In each such case the properties we attach to the bNode correspond to
>>>  properties of the specific individual thing (some book, some person, some
>>>  triple...) described.
>> 
>> OK. I see your point.
>> 
>>>>  Whether two reification bNodes describe the same triple
>>>>  does not necessarily mean that other properties ascribed
>>>>  to each of those bNodes individually apply to all bNodes
>>>>  reifying the same triple.
>>> 
>>>  Trying this again swapping 'triple' for 'person':
>>> 
>>>  whether two [reification] bNodes describe the same Person
>>>  does not necessarily mean that other propeties ascribed
>>>  to each of those bNodes individually apply to all bNodes
>>>  [reifying/describing] the same person.
>>> 
>>>  I'm not sure this works.
>> 
>> Right. I agree that both bNodes refer to the same triple,
> 
> Hey, don't give in so easily.

The results of math intimidation... ;-)

OK, sticking to my non-math based but experience
derived intiutions, I retain my view that the proposed
entailments are not correct.

;-)


> Some properties must be shared, since those follow from the ones we
> know are the same. They have the same truthvalue, in particular, so
> they entail the same things; and they take up the same amount of
> storage space. But that's about all.

Yeah, uh, um, right... what Pat said....

(nice to see a clear rephrasing of what I was thinking ;-)

Patrick

--
               
Patrick Stickler              Phone: +358 50 483 9453
Senior Research Scientist     Fax:   +358 7180 35409
Nokia Research Center         Email: patrick.stickler@nokia.com
Received on Tuesday, 5 February 2002 04:27:29 EST

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