1. queries metadata components metadata query mechanism queries data resource metadata submits query to human machine queries queries type of queries describes user invokes services through rules metadata queries rules language metadata security business technical provides annotation to service interface data resource describes contributes to what Service is describes type of extracts data values from provides formalism for formally describe contributes to Service service constraints rules language rules contributes to Service metadata describes invokes processing give constraint satisfaction results provides formalism for provides conditions for processing resource contributes to contributes to rules processing engine creation / modification info how to invoke service (access to service interface) describes describes contributes to identifies contact for service creation processing resource metadata who responsible for rules processing engine metadata identifies contact for identifies contact for service maintenance type of metadata components service deployment Ken Laskey 5 April 2005