[VCARDDAV] draft-daboo-carddav-directory-gateway and large/multiple directories

[Arnaud Quillaud <[e-mail]>]

Hello,

As currently defined, the directory-gateway property 
(http://tools.ietf.org/html/draft-daboo-carddav-directory-gateway-01#section-3) 
points to a single carddav collection which may aggregate results from 
different sources.
I see two problems with that approach:
- In organizations with a very large number of directory entries, it 
would be much beneficial to be able to offer a choice of multiple 
collections ("all users in my Business Unit",  "all conference rooms", 
etc...).
- It might always be obvious to aggregate data from various sources, 
especially if future extensions allow for paging or sorting of results.

Hence couldn't we allow the directory-gateway property to point to a 
regular collection containing address book collections ? We could 
mandate that address book queries be supported at the root collection 
level to still allow global searches.

Arnaud Quillaud