Obligation-Based Agent Conversations for Semantic Web Service Composition

We deal with composition of semantic web services to which access is controlled by agents. We propose a conversation-based web service composition method. We conceive web services as actions with preconditions and effects, expressed in terms of social norms, particularly obligations. We argue that the inclusion of obligation-based agents´ conversations aide to lead the composition of services. In order to achieve this, we introduce an agent communication language that defines how messages affect agents´ state, and thus, the access to their services. We also propose a method to automatically create a generic composer agent that is able to manage and compose web services, by means of inducing obligations to their participants.