The following is excerpted from the release announcement of MADS: "LC has drafted an XML schema for an authority element set that may be used to provide metadata about agents (people, organizations), events, and terms (topics, geographics, genres, etc.) The MADS draft schema is now available for broad review to inform its completion. Based on input from prospective users, the schema will be revised and made available for experimentation. The review period will be between June 4 and July 16, 2004."