W3C Recommendation 04 September 2007
http://www.w3.org/TR/2007/REC-ws-policy-20070904/Abstract
The Web Services Policy 1.5 - Framework provides a general purpose model and corresponding syntax to describe the policies of entities in a Web services-based system.
Web Services Policy Framework defines a base set of constructs that can be used and extended by other Web services specifications to describe a broad range of service requirements and capabilities.