Gorka Marcos Petra Krämer Arantza Illarramendi Igor García Julián Flórez Semantic Middleware to Enhance Multimedia Retrieval in a Broadcaster. 74-88 2008 SAMT http://dx.doi.org/10.1007/978-3-540-92235-3_8 conf/samt/2008 db/conf/samt/samt2008.html#MarcosKIGF08