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In CXF, elements attached to a wsdl element are available as extensors in the service model representation of that wsdl element. wsp:Policy or wsp:PolicyReference elements can be obtained as extensors of type UnknownExtensibilityElement in which the element name matches that of the wsp:Policy or wsp:PolicyReference element. Note that these attached elements are not parsed when the service model is built.
With xml element attachment in WSDL 1.1, given a Message object, wsp:Policy elements attached to the endpoint or message subject can therefore be obtained by navigating the service model starting with the OperationInfo and/or EndpointInfo object stored in the message (or in the exchange).

The location of documents containing PolicyAttachment documents on the other hand needs to be made known to the framework. This can easily be achieved through configuration:

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<bean class="org.apache.cxf.ws.policy.attachment.external.ExternalAttachmentProvider">
    <constructor-arg ref="cxf"/>
    <property name="location" value="org/apache/cxf/systest/ws/policy/addr-external.xml"/>
</bean>

The location of the document containing PolicyAttachments is specified in the form of a classpath resource or URL. Any number of external attachment providers can be specified, see Specifying the Location of External Attachments.

PolicyAttachments are flexible w.r.t. the type of domain expressions. Domain expressions are used to identify entities such as endpoints, operations or messages with which a policy can be associated:

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