[XCON] CPCP Issue 38: Conference policy privileges mapping to conference policy

[hisham.khartabil at nokia.com]

Supposing I'm trying to modify a conference policy created by Alice, how does the focus know which one of the (possibly many) conference policy privileges documents apply to this specific policy? There is a mapping the other way around (the conf policy privileges document contains the conf policy URI), but is there a need for the same mapping the other way around?

I think there are 3 ways to look at this:

1. It is enough to say that the focus needs to search in the creator's directory looking for a privileges document for a conference. So if Alice created a conference at http://xcap.example.com/services/conference-policies/users/Alice/conference1.xml

Then the focus has to search in Alices conference-policy-privileges directory looking for a privileges document related to that conference. This means that the focus needs to examine the root element of every document.

2. mandate that the conference policy privileges document be the same name as the conference policy document itself

3. include a cross-reference in the conference policy document.

I'm leaning towards 2 for the following reasons:

What if a user created more than 1 privileges document for a conference? This requires the focus to do search in every privileges document belonging to that user to find out if it is possible to place one or not. I think this eliminates option 1 above since there is too much processing.

2 is better than 3 since a user placing a privileges document would override an existing one if present hence eliminating the concern I just brought up. 2 is also simpler than 3 since a privileges document can be created much later or earlier than a conference policy document and a user needs to already decide on the name and location.

Regards,
Hisham

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