http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Critically lauded in its previous three editions, the Fourth Edition will not disappoint fans seeking authoritative and reliable information about popular music from around the world. Expanded to ten volumes, the new edition contains 6,000 new entries, and extensive revisions and updates throughout, yielding 50% more material than the 1998 Third Edition