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I am trying to find out how to implement the USER-CHAIN-ACL access control
policy defined in this I-D as a script, and there is something I do not 
understand.

First of all, I assume that this draft is using the features defined in base-13
and that no modifications in the -base document is needed to develop this 
policy.

My problem is with the 4th paragraph of section 3:

"Access Control Policy:  To ensure write access to Shared Resource by
   Authorized Peers, each Usage MUST permit the USER-CHAIN-ACL access
   policy (see Section 5.4) in addition to its regular access
   policies (USER-MATCH, USER-NODE-MATCH, etc.)."

I do not see in -base how two (or more) Access Control Policies can be used for
one Kind.  We have the same thing in draft-knauf-p2psip-disco:

"Access Control Policy:  Authorized focus peers are allowed to write
   the DisCo-Registration using the USER-CHAIN-ACL access policy.
   The conference creator (and resource owner) is the only exception:
   he is allowed to write based on the USER-MATCH or USER-PATTERN-
   MATCH policy."

How a kind (DisCo-Registration in this case) can use two different access
control policy?

(Note that the configuration schema clearly states that a kind element contains
one data-model element and one access-control element).

Thanks.

- -- 
Marc Petit-Huguenin
Personal email: [email protected]
Professional email: [email protected]
Blog: http://blog.marc.petit-huguenin.org
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