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Re: How do you deprecate URIs? Re: OWL-DL and linked data

From: Bijan Parsia <bparsia@cs.man.ac.uk>
Date: Wed, 9 Jul 2008 21:27:10 +0100
Message-Id: <472A3E04-8A78-418D-B958-2FB8A34483B6@cs.man.ac.uk>
Cc: Richard Cyganiak <richard@cyganiak.de>, Peter Ansell <ansell.peter@gmail.com>, Dan Brickley <danbri@danbri.org>, semantic-web at W3C <semantic-web@w3c.org>, "public-lod@w3.org" <public-lod@w3.org>
To: "Booth, David (HP Software - Boston)" <dbooth@hp.com>

On Jul 9, 2008, at 8:33 PM, Booth, David (HP Software - Boston) wrote:

>
>> From:  Bijan Parsia
>> [ . . . ]
>> 1) sameAs tends to merge annotations and similar meta data, because
>> it's extensional.
>> E.g., If I say someTerm dc:creator "Bijan" and someone else
>> someOtherTerm dc:creator "BoogerHead Jones", and then we say that
>> someTerm sameAs someOtherTerm, we've (semantically) lost the
>> distinguish between who created what.
>
> As described, that example looks to me more like an illustration of  
> the misuse of dc:creator than of owl:sameAs.   If :someTerm and  
> someOtherTerm really denote the same thing, and then according to  
> my reading of owl:sameAs semantics,
>
>     someTerm dc:creator "Bijan" .
>
> means *exactly* the same thing as
>
>     someOtherTerm dc:creator "Bijan" .
>
> so I don't see any inappropriate loss of information.  Am I missing  
> something?

I don't know how you determine which is the "real" mistake.  
Typically, people mean that to be an annotation (e.g., myClass  
dc:creator "Bijan"). You can argue that the annotation system is  
broken (I've done that), but that really just pushes things around.

Cheers,
Bijan
Received on Wednesday, 9 July 2008 20:27:50 UTC

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