WS-Policy is a specification that allows web services to use XML to advertise their policies (on WS-SecurityPolicy, Quality of Service, etc.) and for web service consumers to specify their policy requirements.

= Policy Assertion =

Assertions can either be requirements put upon a web service or an advertisement of the policies of a web service.

= Operator tags =

Two operators (XML tags) are used to make statements about policy combinations:

Logically, an empty wsp:All tag makes no assertions

= Policy Intersection =

The policy intersection is a semantic (as opposed to syntactic) intersection (set theory) 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.

= See Also =