I am preparing a thesis paper for submission into an electronic library database. Our institution cooperates with the British Library that uses their EThOS system to harvest the papers from the local repositories of our and several other universities.
I would like to attach the metadata to my thesis. I've managed to extend the PDFX package so that it in addition to the usual PDF/A metadata also includes the additional elements defined in the sample EThOS XML file.
I am nevertheless not entirely sure this is the right way... One of the reasons is that the generated metadata file is not valid RDF. The problem is in the XSI schema required by the language tag (see the sample XML). As far as I understand RDF and XSI do not combine well. A possible workaround could be not including the XSI schema and the tags that make use of it. That's what I've been doing so far...
Given all of the above, I have two questions.
Is this the right way of embedding the metadata into a PDF or should I somehow attach an XML file to it? How?
If I am doing it right, is there a way to combine the XSI schema and RDF into a valid XMP metadata?