An approach to weave seamlessly non-functional requirements with functional requirements in Web Service composition

In Web Service research, providing methods and tools for automatic composition of services based on functional requirements has gained a lot of attention. However less effort have focused on integrating Non-Functional requirement in web service composition process. Some solutions have been proposed to deal with this challenge. Despite the proposed approaches this issue remains open. In this paper we propose a seamless way to weave dynamically user´s non-functional requirements with functional requirements while composing a user´s desired web service composite. The approach we propose is based on Finite State Automaton formalization and on DIVISE (DIscovery and Visual Interactive web Service Engine) framework we have developed.