A concurrent constraint and pi-calculus-based language for service contracting

In e-service environment, service agreement is essential for assurance of business interoperability and quality of services. Combining service agreement and process model will facilitate analysing service process and monitoring service execution. This paper proposes a concurrent constraint and pi-calculus-based service modelling approach consists of service agreement and process model. Based on this service model, a service contracting mechanism, which checks the consistency between service agreement and process model as well as the applicability of services with respect to the requester's capabilities, is designed.