wall ?

I am just asking this, because i read this →
https://wiki.openstreetmap.org/wiki/GED4ALL
https://wiki.openstreetmap.org/wiki/F3DB
so, why not make it possible for a ‘wall=yes’ between 2 nodes (on/in a building or not) and then maybe add other info, like for i.e. material=* / height=* / colour=* / etc…

-also , there is Key:material AND a Key:building:material … confusing … :roll_eyes: