Distributed Behavioural Adaptation for the Automatic Composition of Semantic Services

Services are developed separately and without knowledge of all possible use contexts. They often mismatch or do not correspond exactly to the end-user needs, making direct composition without mediation impossible. In such a case, software adaptation can support composition by producing semi-automatically new software pieces called adaptors. Adaptation proposals have addressed the signature and behavioural service interface levels. Yet, taking also into account the semantic level is mandatory to enable the fully-automatic retrieval of adaptors from service interfaces. We propose a new adaptation technique that, compared to related work, supports both behavioural and semantic service interface levels, works system-wide, and generates automatically distributed adaptors. keywords: Model-Based Adaptation, Behavioural Adaptation, Semantic Adaptation, Services, Input Output Labelled Transition Systems.