We present an approach for the validation and verification of Web Services choreographies,
and more specifically, for those composite Web Services systems with
timing restrictions. We use a W3C proposal for the description of composite Web
Services, WS-CDL (Web Services Choreography Description Language), and we define
an operational semantics for a relevant subset of it. We then define a translation
of the considered subset ofWS-CDL into a network of timed automata, proving that
this translation is correct. Finally, we use the UPPAAL tool for the validation and
verification of the described system, by using the generated timed automata.