Re: [VCARDDAV] Member: Bidirectional

Cyrus Daboo <cyrus@daboo.name> Mon, 04 October 2010 12:43 UTC

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Date: Mon, 04 Oct 2010 08:44:08 -0400
From: Cyrus Daboo <cyrus@daboo.name>
To: Simon Perreault <simon.perreault@viagenie.ca>, vcarddav@ietf.org
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Subject: Re: [VCARDDAV] Member: Bidirectional
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Hi Simon,

--On October 4, 2010 8:24:59 AM -0400 Simon Perreault 
<simon.perreault@viagenie.ca> wrote:

>> With the MEMBER field, I can create a list of vCard objects that are
>> members of a named group. (I assume the MEMBER field can define a UID
>> field?)
>>
>> However, can I say from a person's vCard object that they are a member
>> of that group? (ie a bidirectional link)
>
> No, and this is intentional. It's a matter of access control. Only
> people having write access to the group's vCard can change its members.
>
> How would you deal with this issue with bidirectional membership?

Plus it would be very hard to maintain accurate back-links to groups unless 
all the vcards were "managed" in some fashion (e.g. something like the 
CardDAV directory gateway).

-- 
Cyrus Daboo