Hi Simon,

Thanks for your reply.
I have used xmpincl and recently stumbled upon pdfx [1] for producing 
PDF/A compliant files (which require some XMP).
I started work on extending pdfx's functionality to support some more 
URIs and embedded reference lists [2], but reading through some of the 
XMP and PDF/A specifications I got a bit put off by the limitations 
imposed on the RDF that can be included as XMP in PDF/A and started 
wondering if it's actually possible.

I wanted to say I had found the Citation Typing Ontology, but then saw 
it is part of SPAR.

Ben

[1] http://www.ctan.org/tex-archive/macros/latex/contrib/pdfx/
[2] https://github.com/bencomp/pdfx-ext

On 12/6/'12 12:15 AM, Simon Spero wrote:
> You can  include XMP packets in pdftex files using the \pdfcatalog
> primitive ; there are a couple of macro packages that add a little bit of a
> wrapper:
>
> xmpincl basically just wraps and inserts the contents of an external
> RDF+XML file as the value of  /Metadata .
> http://www.ctan.org/tex-archive/macros/latex/contrib/xmpincl/
>
> There is no standard ontology for citation data; you might look at
> BIBO http://purl.org/ontology/bibo/     or
> SPAR - http://purl.org/spar/
>
> Simon
> On Mon, Jun 11, 2012 at 5:07 AM, Ben Companjen<[log in to unmask]>  wrote:
>
>> Hi all,
>>
>> I have been wondering whether it is possible to put a bibliography (list
>> of references in a journal article, for example) in an XMP packet in a PDF
>> document. Having read about efforts to get the references from a document
>> by parsing text, I thought it might make sense (and be possible) to put a
>> machine-readable version in the document.
>>
>> I haven't found anyone who had done this (yet), so I started wondering
>> why. Is it too obvious to write about? Or is it impossible?
>>
>> Eventually I'd like to have it automatically created at the same time
>> BibTeX creates the 'normal' bibliography for my pdfLaTeX document. And if
>> the PDF/A standard allows it, have it in such a way that it complies to the
>> long-term archival PDF standard. It appears, however, that PDF/A-1 allows
>> the XMP description of the document itself to have only one author [1],
>> which makes me doubt the use of PDF/A in general.
>> If I manage to get it working, could it be a topic of interest for the
>> Code4Lib Journal?
>>
>> Regards,
>>
>> Ben
>>
>> [1] www.pdfa.org/wp-content/**uploads/2011/08/tn0003_**
>> metadata_in_pdfa-1_2008-03-**182.pdf<http://www.pdfa.org/wp-content/uploads/2011/08/tn0003_metadata_in_pdfa-1_2008-03-182.pdf>
>>