Global Coordination Policies for Services

An important issue of the service oriented approach is the possibility to aggregate, through programmable coordination patterns, the activities involved by service interactions. Two different approaches can be adopted to tackle service coordination: orchestration and choreography. In this paper, we introduce a formal methodology for the with the aim of handling coordinationamong services from the perspective of a global observer in the spirit of choreography models. In particular, we address the problem of verifying compliance and consistency between the design of service interactions and the choreography constraints