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Re: RDFa and RDF

From: Elias Torres <elias@torrez.us>
Date: Fri, 01 Sep 2006 11:58:05 -0400
Message-ID: <44F8588D.9000504@torrez.us>
To: Max Völkel <voelkel@fzi.de>, semantic-web@w3.org


At IBM we have been doing some work in the area and we are exploring
possible answers to your questions in Queso [1]

We give access for read/write via an Atom Publishing Protocol endpoint.
The contents are converted using AtomOWL to RDF (i.e. the entire
contents of the Atom entry XML) and if the content is XHTML, we extract
RDF triples encoded in RDFa and make them available as triples.

Yes, XML-elements become XMLLiterals, subjects are URIs??? (not sure
what else it could be) and yes it's working great for SPARQL queries.


[1] http://torrez.us/archives/2006/07/17/471/

Max Völkel wrote:
> Hi RDFa'ers,
>   I still have a tiny but (to me) important question about RDFa.
>   First,  it  seems a great idea that I can annotate my XHTML document
>   with  RDF,  even better, I can annotate each individual element with
>   RDF,  can  make  elements  being  the  subject  or  object  of  RDF
>   statements.  Wow.  I  even  can  make  RDF  statements  unrelated to
>   elements on the page. Wow.
>   Okay, how do I represent such structures in an API/triple store?
>   Will the XML-elements become XML-Literals? What for the subjects?
>   Are   XPointer-expressions  usingthe  document  as  their  root  an
>   identifier  for  subjects?  I worry, because I need to represent the
>   XML+RDFa  somehow  in  a  triple  store  in  order to to e.g. SPARQL
>   queries.
>   Maybe  I  overlooked  something,  but  I  never  found this relation
>   explained.
> Kind regards,
>   Max Völkel
> --
> Dipl.-Inform. Max Völkel, Universität Karlsruhe / FZI
>             nepomuk.semanticdesktop.org
> voelkel@fzi.de   +49 721 9654-854   www.xam.de
Received on Friday, 1 September 2006 16:01:45 UTC

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