Web Services Semantics is a proposed extension to the WSDL

Web Services Description Language

The Web Services Description Language is an XML-based language that is used for describing the functionality offered by a Web service. A WSDL description of a web service provides a machine-readable description of how the service can be called, what parameters it expects and what data structures...

 standard. WSDL-S extends standard WSDL to include semantic elements which should improve the reusability of Web Services by facilitating the composition of services, improving discovery, and enabling the integration of legacy software with a Web Services framework. WSDL-S was developed by IBM

IBM

International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

 and the University of Georgia

University of Georgia

The University of Georgia is a public research university located in Athens, Georgia, United States. Founded in 1785, it is the oldest and largest of the state's institutions of higher learning and is one of multiple schools to claim the title of the oldest public university in the United States...

.