A namespace for describing a mapping for WS-Policy $Revision: 1.4 $ $Date: 2004/09/04 02:11:01 $ WS-Policy Schema Policy A policy is an informal abstraction and a term that is often used to refer to the set of information that is being expressed as policy assertions . PolicyAssertion A policy assertion represents an individual preference, requirement, capability or other property. PolicyExpression A policy expression is an XML Infoset representation of one or more policy assertions. PolicySubject A policy subject is an entity (e.g., an endpoint, object, or resource) to which a policy expression can be bound. PolicyAttachment The mechanism for associating policy expressions with one or more subjects is referred to as policy attachment. OperatorOrAssertion union of Operators and Assertions. Assertion An atom of policy or capability expression. Operator @@@ allow alternative acceptable policy assertions to be authored. OperatorAll @@@ requires that all of its child elements be satisfied OperatorExactlyOne @@@ which requires that exactly one of its child elements be satisfied OperatorOneOrMore @@@ which requires that at least one of its child elements be satisfied constrainedBy how a policy or operator is constained usage One of Required Rejected Optional Observed Ignored