%0 Book Section
%A Lapadula, Alessandro
%A Pugliese, Rosario
%A Tiezzi, Francesco
%B COORDINATION
%D 2006
%E Ciancarini, Paolo
%E Wiklicky, Herbert
%F eprints:419
%I Springer
%P 145-163
%S Lecture Notes in Computer Science
%T A WSDL-Based Type System for WS-BPEL
%U http://eprints.imtlucca.it/419/
%V 4038
%X We tackle the problem of providing rigorous formal foundations to current software engineering technologies for web services. We focus on two of the most used XML-based languages for web services: WSDL and WS-BPEL. To this aim, first we select an expressive subset of WS-BPEL, with special concern for modeling the interactions among web service instances in a network context, and define its operational semantics. We call ws-calculus the resulting formalism. Then, we put forward a rigorous typing discipline that formalizes the relationship existing between ws-calculus terms and the associated WSDL documents and supports verification of their compliance. We prove that the type system and the operational semantics of ws-calculus are ‘sound’ and apply our approach to an example application involving three interacting web services. 
%Z ©Springer-Verlag Berlin Heidelberg 2006. The original publication is available at www.springerlink.com