TCOZ approach to OWL-s process model design

Complex Semantic Web (SW) services may have intricate data state, autonomous process behavior and concurrent interactions. The design of such Slf services systems requires precise and powerful modelling techniques to capture not only the ontology domain properties but also the services' process behavior and functionalities. Timed Communicating Object Z (TCOZ) is an integrated formal design language which builds on the strengths of Object- Z in modelling complex data stale and strength of Timed CSP in modelling concurrent interaction. In this paper, we illustrate how TCOZ can be used as a high level design language lo design SW sen-ices. Furthermore, the paper presents the development of the systematic translation rules and too! which can automatically extract the services semantic markup (OWL-S) from the formal TCOZ design model The online talk discovery system is used as a demonstrating case study.