[Tagging] key covered=* applied to storage tanks

[Marc_marc]

Le 12.01.23 à 17:02, António Madeira a écrit :
> If, for example, we state that it has a roof=no, you're defining a 
> specific kind of covering, when it has none and you have no way to know 
> if that would be a roof, a tarp, a shed, etc.

roof=* is indeed maybe too specific.
but closed or not tank and tank covered by another object
are 2 different things and therefore require 2 keys :
a tank can be closed or open and be under another object or not,
let's not distort the covered key by saying that unlike objects,
when used on tank, it does not describe anymore the presence
of another object that covers the first.