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Lecture Notes in Computer Science
Contracts play an essential role in the Service Oriented Computing, for which they need to be equiped with a sub-contract relation. We compare two possible formulations, one based on compliance and the other on the testing theory of De Nicola and Hennessy. We show that if the language of contracts is sufficiently expressive then the resulting subcontract relations are incomparable. However if we put natural restrictions on the contract language then the sub-contract relations coincide, at leastdoi:10.1007/978-3-319-05032-4_6 fatcat:nn53fwoww5f6lj627kit4fuf74