Behavioral Interface Conformance Checking for WS-BPEL Processes

Web services can be described at various levels and using various notations, e.g., operations (WSDL), orchestration (WS-BPEL), multi-partners collaborations (WS-CDL). The first two provide descriptions similar to those found in typical programming languages, namely, syntactical description of service interface and operational description of service behavior. In this paper, we show how Web services descriptions can be extended with simple declarative behavior specification, using a form of regular expressions. We explain the relationships between such specifications and WS-BPEL abstract processes. We also describe how a concrete, thus executable, WS-BPEL process can be shown to satisfy its associated abstract specification, using the SPIN model-checker.