Meta Data Service is an object oriented repository technology that can be integrated with enterprise information systems or with applications that process metadata.
Users can use Meta Data Services for their own purposes: as a component of an integrated information system, as a native store for custom applications that process metadata, or as a storage and management service for sharing reusable models. Users can also extend Meta Data Services to provide support for new tools for resale or customize it to satisfy internal tool requirements.
("Meta Data Services". Wikipedia, The Free Encyclopedia. 17 Maret 2009. Wikipedia Foundation. 30 Maret 2009)