UDDI: Universal Description, Discovery, and Integration

Check out the free chapter on UDDI of the O'Reilly 'Java WebService' book by Tyler Jewell
http://oreilly.com/catalog/javawebserv/chapter/ch06.html

It gives a very nice overview on how to use UDDI in general as well as some good detail on how to use taxonomies.

Cheers,

--Kurt