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

From: Pat Hayes <phayes@ihmc.us>
Date: Thu, 13 Oct 2011 20:11:49 -0500
Cc: Sandro Hawke <sandro@w3.org>, public-rdf-wg <public-rdf-wg@w3.org>
Message-Id: <E70E5EA5-E286-4E45-9080-B6F575AF0865@ihmc.us>
To: Dan Brickley <danbri2011@danbri.org>

On Oct 13, 2011, at 3:43 PM, Dan Brickley wrote:

> On 13 Oct 2011, at 13:37, Sandro Hawke <sandro@w3.org> wrote:
> 
>> 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.
>> 
> 
> Maybe :) Can an ebook be a graphcontainer? 
> Or a print of it? Printed on a person? Can an api like mturk that has human as the 'backend'? A gopher server? A fax system? 
> 
> What else could never-ever be a graphcontainer?

Oh, how about...let me see... the great galaxy in Andromeda? The molecular weight of sodium? The concept of happiness? The 21st of August 1944? Avogadro's number? It might be simpler to start by listing all the things that could.

Pat

(Sorry, but you did ask.)

> 
> Dan
> 
>>    -- Sandro
>> 
>>> Pat
>>> 
>>> ------------------------------------------------------------
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>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
>> 
> 

------------------------------------------------------------
IHMC                                     (850)434 8903 or (650)494 3973   
40 South Alcaniz St.           (850)202 4416   office
Pensacola                            (850)202 4440   fax
FL 32502                              (850)291 0667   mobile
phayesAT-SIGNihmc.us       http://www.ihmc.us/users/phayes
Received on Friday, 14 October 2011 01:12:59 GMT

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