Hi Mark, There are 2 reasons why this is not so and probably won't be in the future: 1. Traversing up or down the document tree is processor intensive as they can be indefintitely nested. Operations are kept as much as possible 'local' to a collection and its children. 2. To prevent a potential email flood. If a substantial number of people subscribe to the root of the whole document tree it potentially generates a flood of emails as every change is notified to all of them. What I'm trying to say is that the behavior for 'subscription to a collection' is 'by design', not a bug. Peter
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