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Subject: Re: [office] Single ODF 1.2 metadata proposal

Dear TC members,

Obviously I had skipped one previous revision, but uploaded now a
correction [4]. I apologize for any trouble caused.

As quick summary of this proposal, which is only an enhancement of the
already agreed RDF based metadata proposal.

It was triggered from the feedback of the W3C:
 1) we overtook the now existing RDFa standard. Enable us to use compact
URIs, which for example will save us a lot of space in large spreadsheets.
 2) we provide a GRDDL file to make our metadata easier extractable for
none ODF application (e.g. RDF crawlers)
 3) we dropped boilerplate in connecting the ODF XML world with the RDF
world by simply using relative URLs, making resources behind the IRIs
accessible (like in a web) and better human readable.

Therefore this proposal is pretty much straight forward and I feel
really delighted that we have made this round-trip of refactoring.

PS: BTW XMP is based on RDF and can refer to any ODF resources described
by the new RDF framework. There is no problem.



Svante Schubert wrote:
> Three further remarks:
> 1) I have created and uploaded a W3C GRDDL file (the XSL stylesheet to
> create RDF/XML from RDFa and ODF elements from the meta.xml) [1]
> 2) The namespaces in the proposal have been adapted to the OASIS
> policies pointed out by Mary [2]
> 3) During work on the GRDDL stylesheet it came clear that the RDFa
> properties xhtml:content and xhtml:datatype are exclusive.
> This and the namespaces have been fixed in an updated draft [3].  
> Regards,
> Svante
> [1]
> http://www.oasis-open.org/apps/org/workgroup/office-metadata/download.php/30575/odf2rdf.xsl
> [2] http://lists.oasis-open.org/archives/office/200812/msg00178.html
> [3]
> http://www.oasis-open.org/apps/org/workgroup/office-metadata/download.php/30574/09-01-07-ODF-Metadata-Change-Request.odt
> Svante Schubert wrote:
>> Dear TC members,
>> I would like to ask the TC to vote on this proposal on the next TC
>> call. If you have any further questions regarding the proposal,
>> please send them to me prior to the call.
>> Regards,
>> Svante
>> Svante Schubert wrote:
>>> Dear TC members,
>>> from my feedback of the W3C Semantic Web Interest group I would like
>>> to combine the previous three existing proposal parts to a single
>>> metadata proposal, consisting of three parts:
>>> Adaption of W3C RDFa standard
>>> <http://wiki.oasis-open.org/office/Change_Proposal_for_ODF_1.2_Metadata_-_Adaption_of_W3C_RDFa_standard>
>>> Previously RDFa was not a W3C Recommendation and could not be reused
>>> in our spec, now we are able to adapt the official standard.
>>> Usage of W3C GRDDL standard
>>> <http://wiki.oasis-open.org/office/Change_Proposal_for_ODF_1.2_Metadata_-_Usage_of_W3C_GRDDL_standard>
>>> Meant for non ODF applications to extract the RDF graph from our
>>> content.xml, styles.xml and meta.xml streams via a referenced XSL
>>> stylesheet.
>>> Similar adapted by XHTML files using RDFa standard. The location of
>>> the XSL stylesheet is resolved via the URL of the root namespace
>>> (ie. XHTML use case) or via a GRDDL attribute in the root element
>>> (i.e. ODF use case as namespace is an URN and no URL).
>>> Therefore the only effort for ODF applications is a new root element
>>> attribute, the effect enormous.
>>> (After proposal acceptance I would create the XSL stylesheets and
>>> place it on an OASIS server).
>>> Adaption of RDF mapping to relative URLs
>>> <http://wiki.oasis-open.org/office/Change_Proposal_for_ODF_1.2_Metadata_-_Adaption_of_RDF_mapping_to_relative_URLs>
>>> Currently in the new RDF mapping file (manifest.rdf) an arbitrary
>>> URN is being invented for every ODF element described in the RDF
>>> graph. But this creates troublesome URL alias. Instead the standard
>>> will require that a resource (ODF element) will be mapped directly
>>> to its relative URL.
>>> Currently I am finalizing the overall proposal. In case I will be
>>> ready this evening, I would set it on the agenda of the next TC call.
>>> PS: The previous announced ODF 1.2 proposal of fragment identifier
>>> for URLs to ODF mime types is being withdrawn by myself, due to the
>>> amount of proposals that have been requested to be considered for
>>> ODF 1.2.
>>> Regards,
>>> Svante
>>> -- 
>>> Sun Microsystems GmbH           Svante Schubert
>>> Nagelsweg 55                    Software Engineer
>>> 20097 Hamburg                   StarOffice / OpenOffice.org Development
>>> Germany                         Phone: +49(0)40 236 46 500
>>> http://www.sun.com              Svante.Schubert@sun.com
>>> Sitz der Gesellschaft:
>>> Sun Microsystems GmbH, Sonnenallee 1, D-85551 Kirchheim-Heimstetten
>>> Amtsgericht Muenchen: HRB 161028
>>> Geschaeftsfuehrer: Wolfgang Engels, Dr. Roland Boemer
>>> Vorsitzender des Aufsichtsrates: Martin Haering

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