User talk:Awp-wsu-mr

What is WS-Policy?

WS-Policy provides a flexible and extensible grammar for expressing the capabilities, requirements, and general characteristics of entities in an XML Web services-based system. WS-Policy defines a framework and a model for the expression of these properties as policies. Provide the mechanisms needed to enable Web services to specify policy information. Specifically, it defines: An XML Info-set called a policy expression that contains domain-specific, Web Service policy information. A core set of constructs to indicate how choices and/or combinations of domain specific policy assertions apply in a Web services environment. Web services policies are grouped in three broad categories: •	Versioning policies: the same service (or operation) can exist in the overall system in multiple guises while keeping exactly the same name. This leads to the necessity for SOA to support multiple service versions simultaneously. •	QoS policies: describe the functional & non-functional service properties that collectively define a service, e.g., performance requirements, service reliability, scalability, and availability, transactional requirements, change management and notification, and so on. •	Security policies: indicate the security requirements and policies of a specific Web service. The Web services security policies describe security tokens, digital signatures, and encryption schemes.