The Must Preorder Revisited

Abstract. We define a language for Web services contracts as a parallelfree fragment of ccs and we study a natural notion of compliance between clients and services in terms of their corresponding contracts. The induced contract preorder turns out to be valuable in searching and querying registries of Web services, it shows interesting connections with the must preorder, and it exhibits good precongruence properties when choreographies of Web services are considered. Our contract language may be used as a foundation of Web services technologies, such as wsdl and wscl.

• Type: Conference
• Year: 2007
• Where: CONCUR
• Authors: Cosimo Laneve, Luca Padovani
• Keywords: CONCUR 2007, Web Services, Web Services Contracts, Web Services Technologies