OWL Last Call Working Drafts Published     " href="http://www.w3.org/2001/sw/news#x20030402a">       OWL Last Call Working Drafts Published     The           Web Ontology Working Group has released six Working Drafts,           five in Last Call, for the OWL Web Ontology Language 1.0,           including the OWL Guide,           Overview,           Use           Cases and Requirements, Semantics           and Abstract Syntax, Reference,           and Test           Cases. Comments are welcome through 9 May. OWL is used to           publish and share sets of terms called ontologies, providing           advanced Web search, software agents and knowledge           management.