9.2.  Specifying the Location of External Attachments

To specify the location of an external attachment that the policy framework should take into consideration when aggregating the policies applying to a specific message, you can use the <externalAttachment> element in the same namespace. The following attribute is supported.
location
Location of the external attachment document. This takes the form of http://static.springsource.org/spring/docs/2.0.x/reference/resources.html type property, for example, classpath:etc/policies.xml or file:///x1/resources/polcies.xml.
Below is an example:
<p:externalAttachment location="classpath:org/apache/cxf/systest/ws/policy/addr-external.xml"/>
You can have any number of <externalAttachment> elements in your configuration file.