From DeveloperWorks, Establish a policy-driven SOA using WebSphere Service Registry and Repository and WebSphere ESB

The WS-Policy specification provides a simple language for expressing policies supported by Web services. IBM WebSphere Service Registry and Repository supports loading, changing, and retrieving policy documents, and also supports using policy attachments to link a given policy with a service. This can then be used by a run time component, like an Enterprise Service Bus, to retrieve defined policies for a particular service or operation and act accordingly. This article shows how you can utilize standard WS-Policy documents stored in a registry to impact run time behavior in an ESB -- and then change that behavior on the fly with no code changes or redeployment. (IBM WebSphere Developer Technical Journal)

An example of invoking WSRR API from a WebSphere Enterprise Service Bus medation module to use WS-Policy.

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