location URIs that one receives via an LCP -- either DHCP or HELD. As
Martin's recent post in a DHCP thread pointed out, the trouble is that
we have
1. Ways to deliver location URIs (HELD/DHCP), and
2. A way to manage a specified policy document (XCAP), but not
3. A way to find the policy URI for a given location URI.
I would like to propose that we resolve the latter problem by
<drumroll/> providing a policy URI alongside the location URI. For
example, in HELD
<locationURI policy="http://foo/bar">http://foo/bar</locationURI>
... or in DHCP ....
LuriType=2 Policy URI ...
I think we could agree that this URI MUST be accessible using XCAP
(using the pres-rules AUID, I guess), but one would want to observe that
a client could implement just HTTP GET and PUT to that URI to retrieve
and replace the entire policy document (this being the simplest version
of XCAP). This would provide a pretty light-weight way for clients to
manage policy on location URIs.
There are a few other subtleties to work out -- how the policy URI is
controlled, requests parameters and error codes for HELD, how the
possession model looks in pres-rules -- but I wanted to propose the
general idea to the list to see if there are any obvious problems with
it. If not, I may go write a draft...
Cheers,
--Richard
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