How to mark up multistory buildings on OpenStreetMap?

Question

OpenStreetMap

I'm working in a three-story building that is not in OpenStreetMap. There is a cafe on the first floor, our office on the second floor, the third one is still empty.
In the built-in editor (iD, as I understand it), I added a building rectangle, assigned the address of the cafe to it, and entered all the other information about the cafe.
But our office is on the second floor at the same address. I can't figure out how to add the information that our office occupies the entire second floor, with the company name, address, phone number, and so on. I read the wiki, searched, did not immediately find information on what to do if different types of companies are located in the building ...

Answer 1

option 2: "separate the wheat from the chaff"
draw a building with the address and parameters of the building.
inside the building, put a cafe poi point with cafe parameters + level=0 and a poi point of your office with office parameters + level=1.
according to the recommendations, the points inside the building outline inherit its address.
level "building floor" starts from zero.

Answer 2

The easiest way is to place 2 points, for a cafe and for an office, indicating the location floor. If you still want to get so confused that you want to show that the entire floor is occupied by your office, then you are here Indoor , but no one will know about this for the next 5, or even 10 years, because, as they say, "you can't see it on the map."