On 6/7/11 8:44 AM, 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
<http://schema.org> URIs by schema.rdfs.org <http://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:Descriptionrdf:about="http://schema.org/Person";>
<rdf:typerdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/>
<rdfs:labelxml:lang="en">Person</rdfs:label>
<rdfs:commentxml:lang="en">A person (alive, dead, undead, or
fictional).</rdfs:comment>
<rdfs:subClassOfrdf:resource="http://schema.org/Thing"/>
<rdfs:isDefinedByrdf: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:Descriptionrdf:about="http://schema.rdfs.org/Person";>
<rdf:typerdf:resource="http://www.w3.org/2000/01/rdf-schema#Class"/>
<rdfs:labelxml:lang="en">Person</rdfs:label>
<rdfs:commentxml:lang="en">A person (alive, dead, undead, or
fictional).</rdfs:comment>
<rdfs:subClassOfrdf:resource="http://schema.rdfs.org/Thing"/>
<dcterms:sourcerdf: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?
You didn't miss anything :-)
Here is an example of an updated tweak [1] of what we did with Google's
initial foray into this realm combined with recent developments at:
schema.rdfs.org.
Note, anyone can yank out this data, tweak, and then share (ideally via
Web in pure Linked Data form). I'll be sending an archive to Micheal and
Co. post hitting send button re. this mail.
Links:
1.
http://uriburner.com/describe/?url=http%3A%2F%2Fschema.rdfs.org%2Fall&p=2&lp=4&first=&op=0&gp=2
Kingsley
Bernard
2011/6/3 Michael Hausenblas <michael.hausenb...@deri.org
<mailto:michael.hausenb...@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.vat...@mondeca.com <mailto:bernard.vat...@mondeca.com>
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Regards,
Kingsley Idehen
President& CEO
OpenLink Software
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
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