A query comprising of sub queries, each of which could be of different media types are used to search a collection of multimedia documents in a database. These sub queries are parsed according to media type and operators/functions between these sub queries are recorded creating a set of query objects...http://www.google.fr/patents/US5873080?utm_source=gb-gplus-shareBrevet US5873080 - Using multiple search engines to search multimedia data
Using multiple search engines to search multimedia data
