Transformations Between UML and OWL-S

Abstract. As the number of available Web services increases there is a growing demand to realize complex business processes by combining and reusing avail-able Web services. The reuse and combination of services results in a composition of Web services that may also involve services provided in the Internet. With se-mantically described Web services, an automated matchmaking of capabilities can help identify suitable services. To address the need for semantically defined Web services, OWL-S and WSML have been proposed as competing semantic Web service languages. Both proposals are quite low-level and hard to use even for experienced Web service developers. We propose a UML profile for semantic Web services that enables the use of high-level graphical models as an integration platform for se-mantic Web services. The UML profile provides flexibility as it supports multiple semantic Web service languages. Transformations of both ways between OWL-S and UML are implemented to show that the UML profile is expressive enough to support one of the leading semantic Web service languages.