Web Service Scope Annotations

Kurzfassung

Web services are usually described with Web Service Description Language, which generally assumes that services are always available, and it does not provide a built-in mechanism for describing that services may have a scope. In our paper, we describe the concept of web service scope and we propose a simple mechanism for annotating WSDL with scope information, so that clients can automatically evaluate whether a particular service is useful for them. We demonstrate how XPath can be used to express scoping conditions, however, our solution is extensible with respect to the scope expression language so semantic languages can also be incorporated for applications that require the full expressivity of logics.