Re: [office-metadata] Fw: News Release: W3C Completes Bridge BetweenHTML/Microformats and Semantic Web with GRDDL

[Svante Schubert <Svante.Schubert@Sun.COM>]

Bruce D'Arcus wrote:
> robert_weir@us.ibm.com wrote:
>
>> Does this mean anything for us?  
>
> It might. It would allow, for example, someone to include some custom 
> XML in an ODF package, but include the GRDDL logic to convert it to RDF.
>
> I'm not really sure of the practical use case for that, but I imagine 
> someone may find one.
>
GRDDL is a framework to extract RDF from plain XML by providing an 
algorithm (usually a reference to a XSLT stylesheet).
We in ODF 1.2 offer more than a framework for plain XML, we offer a 
framework for package formats using XML files.

Instead of a GRDDL algorithm we rely on a fixed algorithm by in general 
annotating the relevant XML resources (element nodes) by xml:id 
attributes and using one metadata manifest to relate xml:ids with IRIs 
and to describe related RDF files of the package.

Aside of this package metadata mechanism we define typical ODF resources 
(e.g. odf:ContentFile) and in content metadata of an ODF file (e.g. 
m:about, m:property).
Making this ODF in content metadata extractable using GRDDL and XSLT 
seems possible, but would require the interpretation of the manifest and 
providing the XSLT stylesheet.

Not sure if it is worth the effort, as I doubt that a common GRDDL agent 
would even unzip an ODF document at all.
I would further assume GRDDL would drop some of our nice features as RDF 
named graphs like we currently have for each RDF file.

Rather than looking on agents, I am more focused on the Office Extension 
developer, which might rely on some XSLT library as RDF TWIG when 
working with ODF metadata using XSLT. ;-)

regards,
Svante (on vacation but could not resist)

[1] http://rdftwig.sourceforge.net/paper/index.html