Hi!
We are working on a project to model the university library (BU=bibliothèque universitaire) shelving.
Having not found suitable tags, we created some that met our needs.
Regarding the "indoor=wall" tags, it's the same problem: we want to represent the "shelves" which are fixed objects in the library. I thought that this tag would be relatively well suited to our needs, but I'm not entirely convinced.
So if you have better solutions, I'd be interested :-)
Thanks!