WS-Policy
From Wikipedia, the free encyclopedia
WS-Policy is a specification that allows web services to use XML to advertise their policies (on security, Quality of Service, etc.) and for web service consumers to specify their policy requirements.
WS-Policy was submitted to the W3C on the 13th April 2006
Contents |
[edit] Policy Assertion
Assertions can either be requirements put upon a web service or an advertisement of the policies of a web service.
[edit] Operator tags
Two "operators" (XML tags) are used to make statements about policy combinations:
- wsp:ExactlyOne - asserts that only one child node must be satisfied.
- wsp:All - asserts that all child nodes must be satisfied.
Logically, an empty wsp:All tag makes no assertions.
[edit] Policy Intersection
The policy intersection is a semantic (as opposed to syntactic) intersection of two policies. The intersection is a new policy that complies with both their requirements/capabilities - or, if the policies are incompatible, this is discovered by both parties.
