Contractually Compliant Service Compositions

In the field of service-oriented computing, an e-contract is used to regulate the acceptable behaviours of the services taking part in a composition. C-O Diagrams are a visual model for the specification of deontic e-contracts, including reparations, conditional clauses and real-time restrictions. In this work we define a set of satisfaction rules based on timed automata to see whether a composition is compliant with the contract specification, providing the model with the mathematical rigour necessary for formal verification.