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Maintaining the Quality of Service (QoS) is important for self-healing web service-based distributed interactive applications. It requires the ability to deal with permanently changing constraints both at the communication and the execution levels. Preventing or repairing QoS degradation also requires the capacity of identifying its possible or actual(More)
—Current Web service composition approaches and languages such as WS-BPEL do not allow to define temporal constraints in a declarative and separate way. Also it is not possible to verify if there are contradictions between the temporal constraints implemented in the composition. These limitations lead to maintainability and correctness problems. In this(More)