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Re: owl:sameAs - Is it used in a right way?

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Thu, 21 Mar 2013 13:00:23 -0400
Message-ID: <514B3CA7.90905@openlinksw.com>
To: public-semweb-lifesci@w3.org
On 3/21/13 12:26 PM, Michel Dumontier wrote:
> my problem largely lies in the "identifies" relation between a URI and 
> a document

Yes, but in the context of RDF based Linked Data, a single HTTP URI can 
in fact denote one thing in a manner to uses indirection (implicit or 
explicit) to identify a description document for its referent, leaving 
the "describes" (which is owl:inverseOf wdrs:describedby) relation as 
the final part of the semiotic triad.

Anyway, my illustration isn't cast in stone, I am happy to tweak the 
diagram. For instance, what about replacing "identifies" with "locates" 
which them meshes nicely with the "L" in URL (a Locator/Address) ?

Kingsley
> . and generally, that it wouldn't represent as a triad, but a 
> bilateral relation between an entity (identified by uri) and a 
> document (which refers or describes it).
>
> m.
>
> On Thu, Mar 21, 2013 at 11:05 AM, Kingsley Idehen 
> <kidehen@openlinksw.com <mailto:kidehen@openlinksw.com>> wrote:
>
>     On 3/21/13 10:57 AM, Michel Dumontier wrote:
>>     Kingsley,
>>      I think you raise good points. I also nominally speak of
>>     entities, their attributes and the relations that hold between
>>     them. But I think your diagram is somewhat misleading. URIs do
>>     denote (can stand in the place of) entities of interest in order
>>     to refer to and/or describe them. If you separate the identifier
>>     from what it intends to identify, then you'll need another
>>     identifier for the object of interest (and recurse). Hence, a
>>     information containing object (document, graph, file, etc) may
>>     refer to our entity of interest by some label. the document could
>>     refer to it in some statement, or may contain elaborate
>>     descriptions about it.  But in no way does a document directly
>>     refer to a real world object (in does so indirectly through some
>>     token - an english name, identifier or uri, etc).
>>
>>     m.
>
>     I don't see how my illustration conveys anything contrary to what
>     you've just outlined. The parts:
>
>     1. An entity (in this case a Person) -- a real-world or non Web
>     realm entity
>     2. An identifier that denotes the Person -- e.g., a URI
>     3. A document that describes the person -- e.g. a Document
>     comprised of RDF model based content in the form of an description
>     graph (you can have many of these, each denoted with its own
>     URI-URL based identifier).
>
>     Note: URI-URL is how I convey the fact that you can denote a Web
>     Document using its URL. Thus, Turtle, RDF/XML, RDFa+(X)HTML etc..
>     documents (each with their own URI-URLs) can each be comprised of
>     graphs describing the same entity.
>
>     Kingsley
>>
>>
>>
>>
>>     On Thu, Mar 21, 2013 at 10:27 AM, Kingsley Idehen
>>     <kidehen@openlinksw.com <mailto:kidehen@openlinksw.com>> wrote:
>>
>>         On 3/20/13 10:58 PM, David Booth wrote:
>>>
>>>         Thus, to be very clear, under the existing RDF Semantics
>>>         specification, a given URI does **not** necessarily map to
>>>         only one resource. 
>>
>>         True, but I don't think the statement above always provides
>>         the clarity intended.
>>
>>         "Resource" is a synonym of "Entity" as *now* clearly stated
>>         in the latest RDF concepts guide [1]. Once we get over the
>>         conflation inherent in "Resource" and look towards "Entity"
>>         the issue starts to get much clearer, as exemplified by RDF
>>         based Linked Data [2] and its specific use of URIs to denote
>>         "Entities" while also identifying their "Descriptor Documents".
>>
>>         All "Resources" aren't of the same medium. The Web, Internet
>>         are mediums distinct from the medium we *refer to* as the
>>         real-world. Thus, the claim that everything is a "Resource"
>>         without medium specificity is one of the ultimate recipes for
>>         unproductive debate and confusion, as a zillion mail threads
>>         over the years have demonstrated.
>>
>>         In the context of RDF, a URI denotes an Entity.
>>         In the context of RDF based Linked Data, a URI denotes an
>>         Entity in a manner that enables it resolve to a Web Document
>>         (denoted by its own URI which is usually a URL) that
>>         describes the denoted entity (aka. URI referent) .
>>
>>
>>         Links:
>>         1.
>>         http://www.w3.org/TR/rdf11-concepts/#resources-and-statements
>>         -- showcasing the critical "Resource" fix
>>         2. http://twitpic.com/cbk8ul -- illustrating HTTP URI duality
>>         and the Semiotic triangle .
>>
>>
>>         -- 
>>
>>         Regards,
>>
>>         Kingsley Idehen	
>>         Founder & CEO
>>         OpenLink Software
>>         Company Web:http://www.openlinksw.com
>>         Personal Weblog:http://www.openlinksw.com/blog/~kidehen  <http://www.openlinksw.com/blog/%7Ekidehen>
>>         Twitter/Identi.ca handle: @kidehen
>>         Google+ Profile:https://plus.google.com/112399767740508618350/about
>>         LinkedIn Profile:http://www.linkedin.com/in/kidehen
>>
>>
>>
>>
>>
>>
>>
>>     -- 
>>     Michel Dumontier
>>     Associate Professor of Bioinformatics, Carleton University
>>     Chair, W3C Semantic Web for Health Care and the Life Sciences
>>     Interest Group
>>     http://dumontierlab.com
>
>
>     -- 
>
>     Regards,
>
>     Kingsley Idehen	
>     Founder & CEO
>     OpenLink Software
>     Company Web:http://www.openlinksw.com
>     Personal Weblog:http://www.openlinksw.com/blog/~kidehen  <http://www.openlinksw.com/blog/%7Ekidehen>
>     Twitter/Identi.ca handle: @kidehen
>     Google+ Profile:https://plus.google.com/112399767740508618350/about
>     LinkedIn Profile:http://www.linkedin.com/in/kidehen
>
>
>
>
>
>
>
> -- 
> Michel Dumontier
> Associate Professor of Bioinformatics, Carleton University
> Chair, W3C Semantic Web for Health Care and the Life Sciences Interest 
> Group
> http://dumontierlab.com


-- 

Regards,

Kingsley Idehen	
Founder & CEO
OpenLink Software
Company Web: http://www.openlinksw.com
Personal Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca handle: @kidehen
Google+ Profile: https://plus.google.com/112399767740508618350/about
LinkedIn Profile: http://www.linkedin.com/in/kidehen







Received on Thursday, 21 March 2013 17:00:51 UTC

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