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Web services are predominantly used to implement service-oriented architectures (SOA). However, there are several areas such as temporal dimensions, real-time, streaming, or efficient and flexible file transfers where needs arise to extend web service functionality. These extensions can, for example, be achieved using web service policies (WS-Policies). Since there are often alternative solutions to provide functionality (e.g., different protocols can be used to achieve the transfer of data), the WS-Policy standard is especially useful to extend web service descriptions with policies. The standard describes how to create policies to generally state the properties under which a service is provided. Two novel policies are presented as well as their applicability to several areas, such as streaming, real-time, transfer of data, and usability.

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Steffen Heinzl is a Researcher at SAP Research. He received his PhD at the Department of Mathematics and Computer Science at the University of Marburg, and his Diploma in Computer Science from the University of Applied Sciences, Fulda. His research interests include WS-Policies, pricing and usability of, and data transfers between Web Services.

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