If trees could be drawn upside down in computer analogy, then I thought, why not give "metadatas" a try... :-P ... No, seriously, "metadatas" sounds awkward as well. Now when I just thought of singular, "datum" crossed my mind... ... I guess Nah!

Well, I tried to think about a few options and have listed them below:

Frankly, I am quite satisfied now with any name. After pondering over the names for some time, they all look the same to me now... :-)...

Group name addition to the namespace looks very good, and proper.

- Kailash