The system and method for searching and retrieving information stored in heterogeneous information repositories. A portal server retrieves user requests through a computer network and looks up information stored in a metadata databases. For example, the metadata may be encoded in an XML/RDF format and...http://www.google.se/patents/US6701314?utm_source=gb-gplus-sharePatent US6701314 - System and method for cataloguing digital information for searching and retrieval