C.: Context modeling and constraints binding in web service business processes

Context awareness is a principle used in pervasive services applications to enhance their flexibility and adaptability to changing conditions and dynamic environments. Ontologies provide a suitable framework for context modeling and rea-soning. We develop a context model for executable business processes – captured as an ontology for the web services do-main. A web service description is attached to a service con-text profile, which is bound to the context ontology. Context instances can be generated dynamically at services runtime and are bound to context constraint services. Constraint services facilitate both setting up constraint properties and constraint checkers, which determine the dynamic validity of context instances. Data collectors focus on capturing context instances. Runtime integration of both constraint services and data collectors permit the business process to achieve dynamic business goals