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Subject: Re: [office] RDF support?

On 12.10.2015 15:32, Jos van den Oever wrote:
> On Saturday 10 October 2015 21:03:17 Patrick Durusau wrote:
>> Greetings!
>> Is RDF support on the roadmap for any of the implementers of ODF?
>> Despite my misgivings about RDF, it would clearly be superior to current
>> metadata support in office software in general.
>> Not that I think we need to make changes but if we could encourage such
>> support sooner rather than later, it could make a selling point for ODF.
> Calligra has RDF support and even a built-in sparql engine. It is not used 
> widely I think.
> LibreOffice has support for loading and saving. I do not know if there is an API 
> for accessing and changing the metadata.

yes there is:


in summary we have in Writer xml:id support on the most important
elements, support for text:meta and text:meta-field elements, plus a
generic  RDF API for extensions/macros with an in-memory RDF store and
ODF import/export for all that.

the most important missing feature is copy/paste: when some content
element is copied, the copy/paste of the RDF metadata referencing that
element via its xml:id is left completely unspecified by ODF, which is
unlikely to yield similar results in different implementations.  (the
problem is that the RDF graphs have arbitrary connections and have no
"natural hierarchy" (they are not trees), and of course by the very
nature of the feature ODF implementations cannot assume particular
semantics of the RDF properties that happen to be used in some file.)

there is also no UI for RDF metadata, but that is sort of intentional:
the feature is mostly intended to be used by extensions.

unfortunately currently nobody is working on it.

Michael Stahl | Software Engineer
Platform Engineering - Desktop Team
Red Hat

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