This page summarizes the work of the Semantic Annotations for WSDL (SAWSDL) Working Group which was started by W3C in April 2006 and is currently continuing. The objective of the Working Group is to develop a mechanism to enable semantic annotation of Web services descriptions.
Calais is a web service that uses natural language processing (NLP) technology to semantically tag text that is input to the service. The tags are delivered to the user who can then incorporate them into other applications - for search, news aggregation, blogs, catalogs, you name it.
Calais is a rapidly growing toolkit of capabilities that allow you to readily incorporate state-of-the-art semantic functionality within your blog, content management system, website or application.
C. Wu, V. Potdar, and E. Chang. Advances in Web Semantics I: Ontologies, Web Services and Applied Semantic Web, volume 4891 of Lecture Notes in Computer Science, Springer, Berlin, (2009)
K. Sycara, and R. Vacul\'ın. Advances in Web Semantics I: Ontologies, Web Services and Applied Semantic Web, volume 4891 of Lecture Notes in Computer Science, Springer, Berlin, (2009)
S. Bhiri, W. Gaaloul, M. Rouached, and M. Hauswirth. Advances in Web Semantics I: Ontologies, Web Services and Applied Semantic Web, volume 4891 of Lecture Notes in Computer Science, Springer, Berlin, (2009)
D. Porta. Informatik 2010: Service Science -- Neue Perspektiven für die Informatik, Beiträge der 40. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Band 1, volume P-175 of GI Edition: Lecture Notes in Informatics (LNI) -- Proceedings, page 497--502. Bonn, Gesellschaft für Informatik, (2010)