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  • None of the previous solutions is addressing the non-functional aspects in the context of Web Services
    • e.g., a Web Service can be accessed only if a particular security constrains (like secure channel communication) hold.
  • WS-Policy is an XML-based set of specifications to advertise and specify service-related non-functional metadata
    • Security, Quality of service, Privacy, Transactional policies
  • WS-Policy main specifications
    • WS-Policy Framework
      • Provides model and syntax to describe and communicate policies
  • WS-Policy Assertions
    • Defines a common set of policy assertions for Web services
  • WS-Policy Attachments
    • General-purpose mechanisms for associating such policies with the subjects to which they apply
  • Capability vs. requirement policy

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