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Overview
- 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 Framework
- 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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