Information Retrieval beyond the Text Document.

Reports some of the progress made over the years toward exploring information beyond the text domain. Describes the Multimedia Analysis and Retrieval Systems (MARS), developed to increase access to non-textual information. Addresses the following aspects of MARS: (1) visual feature extraction; (2) retrieval models; (3) query reformulation techniques; (4) efficient execution speed performance; and (5) user interface considerations. (AEF)