This wish is an importent wish in my opinion.
I want to have some kind of level functionality in the categories of zones but more as a tree-functionality as below
abc
-abca
--abcaa
--abcab
-abcb
--abcba
--abcbb
---abcbba
And one object are connected to all zones that are covering this object.
And zones are connected to all zones that are above, "zone abcab are connecte to abca and abc"
Then you could list all objects in a building and display which room / department it's connected too. And as with our layouts, so should zones have the ability to inherit id from above.
So if my room has the number 01214 it could be house 01, story 2, department 1, room 4 so, my room inherit 01,2,1 from the zones on higher levels.
2 zones in the same category could not overlap. But two categories could be on the same level