Proposed features/Building attributes
This page has been a mix of all kinds of proposals. Some do not work in the form they are currently proposed or were contradicting other parts while other tags are already widely used and work well.
If you search for documentation of 3D buildings have a look at the page Simple 3D Buildings
|The 3D Development team are currently working on unifying 3D related tags.
For first results see Simple 3D Buildings.