A Semantic Driven Approach for an Automated Composition Based on Abstract Services

With the growth of the number of Web services published over Internet, identifying composite services by taking into account both functional and non-functional requirements of end users has become a real challenge that needs to be addressed. This challenge is aggravated in the case of situations requiring adaptation to user context. To overcome these challenges, we propose a solution that enables a certain flexibility and adaptability without having to deal with composition from scratch at runtime. Our approach consists in generating automatically a composition schema at the abstract service level. The design-time components of our solution are OWL-S abstract services that are used within the composition process for deriving different composition possibilities and for reducing the difficulty of the tasks of discovery and selection of the actual Web services. This mechanism relies also on a specification of user requirements structured as intentions graph.