W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > October 2001

Re: Closing rdfms-difference-between-ID-and-about

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Wed, 24 Oct 2001 17:37:06 -0500
Message-Id: <p05101073b7fcf16a3103@[205.160.76.193]>
To: Graham Klyne <Graham.Klyne@MIMEsweeper.com>
Cc: w3c-rdfcore-wg@w3.org
>At 11:18 PM 10/23/01 -0500, Pat Hayes wrote:
>
>>>Can we extend the notion of a tidy graph so that it removes 
>>>duplicate statements.  Any untidy graph has an equivalent tidy 
>>>graph, and the model theory is defined in terms of that.
>>
>>Yes, we can do that. Everyone go on that?
>
>I think so, but a fleeting worry about literals crossed my mind:
>
>    ex:subj ex:prop "lit" .
>    ex:subj ex:prop "lit" .
>
>I can't see any actual problem here, but at some stage there seemed 
>to be this idea that different instances of a literal were distinct 
>things in the abstract syntax;  e.g. so that things like:
>    ex:shoe shoe:size "10" .
>    ex:shoe shoe:label "10" .
>could be interpreted appropriately.
>
>Just checking.

Yes, good point. However I think that the only way that two tokens of 
a  literal could possibly need to be distinguished would be if they 
were somewhere, somehow, included in two different triples, in any 
datatyping scheme.  Otherwise you could co-data-type them without 
causing any contradictions with anything else. So this would be safe 
even in this case.

Pat

-- 
---------------------------------------------------------------------
IHMC					(850)434 8903   home
40 South Alcaniz St.			(850)202 4416   office
Pensacola,  FL 32501			(850)202 4440   fax
phayes@ai.uwf.edu 
http://www.coginst.uwf.edu/~phayes
Received on Wednesday, 24 October 2001 18:37:11 EDT

This archive was generated by hypermail pre-2.1.9 : Wednesday, 3 September 2003 09:41:11 EDT