I'm looking for documentation (or just advice) on setting up Space - Group parent relationships for Open Atrium. I've viewed a number of Open Atrium webinars and sifted through documentation, but surprisingly, I haven't found much on this specific topic. Most of what I've found simply refers to group members of spaces, but that does not (as far as I can tell) imply anything about how exactly that membership is configured. An example is this Building Blocks + Case Study PDF.
For most use cases, it seems to make sense that top-level groups would be the parents of spaces, with something like the following:
Are there use cases for having the spaces as parents? What are the implications for user permissions and access control inheritance?