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.
F. Baader, B. Ganter, B. Sertkaya, and U. Sattler. Proceedings of the 20th international joint conference on Artifical intelligence, page 230--235. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2007)