Domain-Independent, Composable Web Services Policy Assertions

Authors:
Anne H. Anderson
Affiliations:
Sun Microsystems, Inc.
Venue:
POLICY '06 Proceedings of the Seventh IEEE International Workshop on Policies for Distributed Systems and Networks
Year:
2006

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Abstract

The current model for the predicates, or "Assertions", used in a WS-Policy instance is for each policy domain to design new schema elements for that domain's Assertions. Their semantics are defined in an associated specification and are domain-specific. This model leads to interoperability and maintenance problems and hinders dynamic service composition. WS-PolicyConstraints is a domain-independent language for writing Assertions that is based on the Web Services Policy Language subset of XACML; it differs in addressing only the Assertion layer. This paper describes problems with domain-specific Assertions, the WS-PolicyConstraints alternative, and problems encountered in the development of this language.