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Perhaps I'm not sure what you're looking for, but the Getty has the Art & Architecture Thesaurus: http://www.getty.edu/vow/AATHierarchy?find=dvd&logic=AND¬e=&page=1&su bjectid=300220523 (got your cd, dvd, but not blu-ray... yet) But when you're talking "digital" (sans container), I guess you're just talking format, like you said. For that, there's the PRONOM registry: http://www.nationalarchives.gov.uk/pronom/ Either of those helpful? Mark -----Original Message----- From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Jonathan Rochkind Sent: Wednesday, January 14, 2009 12:24 PM To: [log in to unmask] Subject: [CODE4LIB] multimedia carrier vocabulary? Anyone know of any good existing controlled vocabulary for 'format' or 'carrier' for multimedia materials? I'm thinking of things like "CD", "DVD", "digital", etc. The closest I can get is from RDA at http://metadataregistry.org/concept/list/vocabulary_id/46.html (thanks Karen and Diane), but it seems _really_ insufficient. As far as I can tell "audio disc" is used for both a CD and a vinyl disc, and there's nothing available there for "DVD" at all. Or for "digital". Although I'm not sure what I mean by "digital", I guess CD and DVD are both digital, but I was thinking of something to identify a digital file on a computer network free of particular carrier. I guess that wouldn't be in a carrier vocabulary at all, after all, that would be sort of a null carrier. Phew, this stuff does get complicated quick. Which I guess is why nobody's worked out a good one yet. Too bad RDA's is so _far_ from good though. Any others anyone knows about? Jonathan -- Jonathan Rochkind Digital Services Software Engineer The Sheridan Libraries Johns Hopkins University 410.516.8886 rochkind (at) jhu.edu