A team of researchers from the Politecnico di Milano and CEFREIL Labs, led by Stefano Ceri, won the 2006 Semantic Web Services Challenge (SWS), organised by Stanford University. The goal of the SWS Challenge is to develop a common understanding of various technologies intended to facilitate the automation of mediation, choreography and discovery for Web Services using semantic annotations. The challenge required the solution of a Web Service mediation problem and a Web Service discovery problem. The implementation presented by the Italian team was judged the most complete. See: http://deri.stanford.edu/challenge/2006/