Should buckets be nestable?

[evanstade]

In alignment with the goal of enabling data organization by web developers ("Allow web applications to evict slices of data"), should buckets be nestable?

Hypothetical use case: an email client that allows multiuser sign-in, and organizes each user's data into multiple buckets, such as drafts and inbox. The drafts bucket would be a child bucket of the user-1234 bucket.

Behavior: deleting a parent bucket should delete child buckets. Unspecified bucket policies should default to parent bucket policy values.

[asutherland]

I think the answer here would depend on reaching a conclusion for the discussion in #36 about the minimum and maximum number of buckets we expect browsers to support. If we can only guarantee origins 10 buckets, there's little point in adding a concept of hierarchy and having to deal with the dependency graph that would result.