Suggest a change to the 3rd bullet in section 3.6

<old>
Use the referenced IRI and retrieve a policy expression from some 
policy repository (local or remote) or catalog. Policy tools may use 
any protocols (say Web Services Metadata Exchange) for such metadata 
retrieval. These protocols may require additional out of band information.
</old>
<new>
Use the referenced IRI and retrieve a policy expression from some 
policy repository (local or remote), registry, or catalog. Policy 
tools or policy-aware clients may use any protocols (say UDDI or Web 
Services Metadata Exchange) for such metadata retrieval. These 
protocols may require additional out of band information.
</new>

Rationale:
Policy-aware clients may also need to retrieve policies, not just tools.

WS-Policy - Attachment REC has normative references to UDDI (an OASIS 
standard).  Attachment REC makes non-normative reference to 
WS-MEX.  Either or both protocols may be used in retrieval of policy.

UDDI is considered a "registry", not a "repository".  Perhaps UDDI 
can be considered a "catalog", but usually the term "registry" is used.