The [URL=http://www.w3.org/Submission/2010/SUBM-WSMO-Lite-20100823/]"WSMO-Lite: Lightweight Semantic Descriptions for Services on the Web"[/URL] specification has been published as a W3C Member Submission, co-authored by experts from the University of Insbruck, the Open University, Ontotext AD, FZI, and the University of Manchester. WSMO-Lite is a restricted subset of [URL=http://www.w3.org/Submission/2005/06]WSMO (Web Services Modelling Ontology)[/URL], to be used as an extension to [URL=http://www.w3.org/TR/sawsdl/]SAWSDL[/URL] and [URL=http://www.w3.org/TR/wsdl20]WSDL[/URL] for Web Services descriptions. It proposes a layered approach for addition of semantics at the different description levels: the data model (in XML Schema) is annotated with a domain ontology, the interface (in WSDL) is annotated with conditions for invocation of the service and effects of that invocation, the overall functionality of the service is annotated thanks to a service classification ontology.

http://www.w3.org/blog/SW/2010/09/14/wsmo_lite_lightweight_semantic_descripti