Okay DigiPresHiveMind, I have a question... I have a big pile of MARC XML. I don't know MARC, so unlike the experts I've worked with, I can't expand all these letters and codes in my head! Is there a library that will do some basic expansion of MARC into something I can understand? I realise this might be lossy, but some kind of Dublin Core or plain-old-CSV projection would be helpful!
Writing that made me realised XSLT exists, and I managed to find
https://www.loc.gov/standards/marcxml/xslt/MARC21slim2RDFDC.xsl but not really any official looking documentation about it?
Ah, okay, DC in RDF. Now I have two problems... ;-)
https://www.loc.gov/standards/marcxml/(there is also some METS for every MARC...)
Looking at pymarc, it seems like this'll do: "A pymarc.Record object has a few handy properties like title for getting at bits of a bibliographic record, others include: author, isbn, subjects, location, notes, physicaldescription, publisher, pubyear." (It goes on to warn that this is missing a lot of detail, but I can live with that for this purpose).