If it's going on the web, and contains semantics, why not put it on the Semantic Web?
See:
http://www.w3.org/2004/01/sws-pressrelease
in particular - RDF Thesaurus:
http://www.w3c.rl.ac.uk/SWAD/rdfthes.html
(the titles are links)
Cheers,
Danny.
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http://dannyayers.com