Abstract: Semantic Web Service (SWS) is a step towards automating Web Services in order to face the challenges in Business to Business. SWS based business services composition is one of the most hyped and addressed issues in the field of services oriented computing. hhis paper provided basic ideas and methods toward SWS based business services composition. First, a formal model of business services composition was introduced. Second, an approach to service set mining for service composition was presented,and finally,the paper presented the solution model of requirement driven service selection and composition.

Key words: SWS,Busincss process, Service set, Service selection, Service composition