The S3 contest provides means and forum for evaluating the retrieval performance of Semantic Web service matchmakers (recall, precision, F1, response time etc.) over given test collections for most prominent semantic service formats such as OWL-S, WSML and the standard SA-WSDL. You are cordially invited to join both activities, testing available matchmakers and the building of semantic service retrieval test collections.
This special contest is complementary to the Semantic Web Services Challenge (SWSC).
OPOSSUM Portal: http://fusion.cs.uni-jena.de/opossum/