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Re: New Proposal (6.1) for GRAPHS

From: Ivan Herman <ivan@w3.org>
Date: Fri, 30 Mar 2012 10:41:52 +0200
Cc: Sandro Hawke <sandro@w3.org>, public-rdf-wg <public-rdf-wg@w3.org>
Message-Id: <74985EEF-4B8A-40A2-AD82-DB1FF8FC2063@w3.org>
To: Pat Hayes <phayes@ihmc.us>
Pat,

just wondering...

On Mar 29, 2012, at 17:47 , Pat Hayes wrote:

> 
> Contrary to what I said in the telecon yesterday, I now don't think there is any way out of this within the current RDF framework. Basically, you want to talk about the naming relation between a URI and a denotation, and you can't do that in a conventional  rdf-2004-style model theory. You need a small amount of referential opacity to make this work. We will have to change something to get that.
> 

My disagreement[1] with Sandro on his approach has been on his usage of the rdf:hasGraph relationship and his approach of describing things through these terms. Ie, to try to explain things in terms of the RDF semantics.

My approach was much looser; we do define RDF classes for the various relationships (say, rdf:GraphLabel and rdf:Graph) but only as some sort of categorization for applications that require that, but the exact, hm, behaviour (I did not want to use the word 'semantics') of what

<a> { a b c }

means in term of loose labeling, equality, or strict HTTP retrieval, would be left to English prose, _not_ part of the RDF semantics per se. Is this what you mean? Would that be a way out at least for the coming years?

Ivan


[1] http://lists.w3.org/Archives/Public/public-rdf-wg/2012Mar/0126.html

> Pat
> 
> 
> 
>> 
>> That page includes answers to all the current GRAPHS issues, including
>> ISSUE-5, ISSUE-14, etc.
>> 
>> Eric has started going through Why Graphs and adding the examples as
>> addressed by Proposal 6.1:
>> http://www.w3.org/2011/rdf-wg/wiki/Why_Graphs_6.1
>> 
>>    -- Sandro (with Eric nearby)
>> 
>> 
>> 
> 
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----
Ivan Herman, W3C Semantic Web Activity Lead
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Received on Friday, 30 March 2012 08:40:45 GMT

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