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Subject: Public discussion of domain-independent web services policy assertionlanguage
Colleagues, I am posting this to the XACML list because the proposed language uses XACML functions as a base and would allow certain XACML policies to be converted to web services policies easily. Please take any further discussion to dipal-discuss@lists.oasis-open.org. There is now a public e-mail discussion list at OASIS on possible standardization of a domain-independent web services policy assertion language. Sun has offered to contribute the XACML-based Web Services Policy Constraints Language (WS-PolicyConstraints) on royalty-free terms as a possible starting point for such a language. This language does not conflict with WS-Policy; it is designed to work within a policy framework such as WS-Policy provides to deal with the policy "Assertions" layer in a standard, interoperable way. I encourage you to subscribe to this list at dipal-discuss-subscribe@lists.oasis-open.org We need comments - pro and con - on both the concept and on the specific proposal. It is my belief that a domain-independent language for expressing policy assertions will significantly enhance the interoperability and maintainability of web services policy processors. It will also enable the next generation of dynamically linked web services, where both consumer and producer services will have requirements that need to be satisfied. Such a language will also greatly assist those of you who have applications or domains that will require their own new policy Assertion types, as such a language will greatly reduce the effort required to implement and deploy support for new Assertions. WS-PolicyConstraints allows easy use of SAML or XACML Attributes in web services policies, so it supports better interoperability in this way as well. There are resources on this topic available at http://research.sun.com/projects/xacml/, including an introductory white paper and the WS-PolicyConstraints specification. I am happy to try to answer any questions. Regards, Anne Anderson -- Anne H. Anderson Anne.Anderson@sun.com Sun Microsystems Labs 1-781-442-0928 Burlington, MA USA
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