content-metadata ideas

[Bruce D'Arcus <bruce.darcus@OpenDocument.us>]

Svante asked if we could start discussing implementation ideas. I 
actually think the hardest part is the requirement to define a 
mechanism to associate content with metadata, and the existing work 
that we want to look at closely RDF/A:

	<http://www.w3.org/2001/sw/BestPractices/HTML/2005-rdfa-syntax>

Basically, they define a handful of attributes and elements one can use 
within document formats to do this.

One caveat, though:

ODF is not XHTML. It's structured differently (we have the package), 
and rarely hand-authored.

So, for example, they use a lot of inline metadata, which we probably 
neither want nor need to.

But we do need a clear way to identify objects, and to link them to 
descriptions, and RDF/A provides a good way to think about that. A few 
simple attributes can probably go a long way.

I was thinking of an example like this for custom fields:

Citation (there is already a citation field scheduled for 1.2, but this 
just makes it generic):

<text:structuredField>
<!-- use an IRI to bind to control config and metadata graph elsewhere 
in package -->
   <dc:type rdf:resource="http://opendocument.xml.org/fields/citation"/>
   <text:source>
     <meta:reference meta:rel="http://purl.org/dc/elements/1.1/source"; 
meta:resource="urn:isbn:34129845" cite:pages="23"/>
     <meta:reference meta:rel="http://purl.org/dc/elements/1.1/source"; 
meta:resource="urn:isbn:91273422"/>
   </text:source>
   <text:body>
     (Doe, 1999; Smith, 2000: 23)
   </text:body>
</text:structuredField>

Contact reference:

<text:structuredField>
   <dc:type rdf:resource="http://opendocument.xml.org/fields/contact"/>
   <text:source>
     <meta:reference meta:rel="http://ex.net/medical#patient"; 
xlink:href="contacts/meta.xml#doej"/>
   </text:source>
   <text:body>
     Jane Doe
   </text:body>
</text:structuredField>

Bruce