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Re: Schema.org in RDF ...

From: Michael Hausenblas <michael.hausenblas@deri.org>
Date: Tue, 7 Jun 2011 09:22:01 +0100
Cc: Linked Data community <public-lod@w3.org>
Message-Id: <28FF05DF-D449-4085-A34A-D3E37B818786@deri.org>
To: Bernard Vatant <bernard.vatant@mondeca.com>
> Something I don't understand. If I read well all savvy discussions  
> so far, publishers behind http://schema.org URIs are unlikely to  
> ever provide any RDF description,

What makes you so sure about that not one day in the (near?) future  
the Schema.org URIs will serve RDF or JSON, FWIW, additionally to  
HTML? ;)

Cheers,
	Michael
--
Dr. Michael Hausenblas, Research Fellow
LiDRC - Linked Data Research Centre
DERI - Digital Enterprise Research Institute
NUIG - National University of Ireland, Galway
Ireland, Europe
Tel. +353 91 495730
http://linkeddata.deri.ie/
http://sw-app.org/about.html

On 7 Jun 2011, at 08:44, Bernard Vatant wrote:

> Hi all
>
> Something I don't understand. If I read well all savvy discussions  
> so far, publishers behind http://schema.org URIs are unlikely to  
> ever provide any RDF description, so why are those URIs declared as  
> identifiers of RDFS classes in the http://schema.rdfs.org/all.rdf.  
> For all I can see, http://schema.org/Person is the URI of an  
> information resource, not of a class.
> So I would rather have expected mirroring of the schema.org URIs by  
> schema.rdfs.org URIs, the later fully dereferencable proper RDFS  
> classes expliciting the semantics of the former, while keeping the  
> reference to the source in some dcterms:source element.
>
> Example, instead of ...
>
> <rdf:Description rdf:about="http://schema.org/Person">
> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/>
> <rdfs:label xml:lang="en">Person</rdfs:label>
> <rdfs:comment xml:lang="en">A person (alive, dead, undead, or  
> fictional).</rdfs:comment>
> <rdfs:subClassOf rdf:resource="http://schema.org/Thing"/>
> <rdfs:isDefinedBy rdf:resource="http://schema.org/Person"/>
> </rdf:Description>
>
> where I see a clear abuse of rdfs:isDefinedBy, since if you  
> dereference the said URI, you don't find any explicit RDF  
> definition ...
>
> I would rather have the following
>
> <rdf:Description rdf:about="http://schema.rdfs.org/Person">
> <rdf:type rdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/>
> <rdfs:label xml:lang="en">Person</rdfs:label>
> <rdfs:comment xml:lang="en">A person (alive, dead, undead, or  
> fictional).</rdfs:comment>
> <rdfs:subClassOf rdf:resource="http://schema.rdfs.org/Thing"/>
> <dcterms:source rdf:resource="http://schema.org/Person"/>
> </rdf:Description>
>
> To the latter declaration, one could safely add statements like
>
> schema.rdfs:Person rdfs:subClassOf  foaf:Person
>
> etc
>
> Or do I miss the point?
>
> Bernard
>
> 2011/6/3 Michael Hausenblas <michael.hausenblas@deri.org>
>
> http://schema.rdfs.org
>
> ... is now available - we're sorry for the delay ;)
>
> Cheers,
>        Michael
> --
> Dr. Michael Hausenblas, Research Fellow
> LiDRC - Linked Data Research Centre
> DERI - Digital Enterprise Research Institute
> NUIG - National University of Ireland, Galway
> Ireland, Europe
> Tel. +353 91 495730
> http://linkeddata.deri.ie/
> http://sw-app.org/about.html
>
>
>
>
>
> -- 
> Bernard Vatant
> Senior Consultant
> Vocabulary & Data Integration
> Tel:       +33 (0) 971 488 459
> Mail:     bernard.vatant@mondeca.com
> ----------------------------------------------------
> Mondeca
> 3, cité Nollez 75018 Paris France
> Web:    http://www.mondeca.com
> Blog:    http://mondeca.wordpress.com
> ----------------------------------------------------
Received on Tuesday, 7 June 2011 08:22:30 UTC

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