Hi MxxCon, as per OSM wiki, the attribute tunnel=building_passage is used for ways that go through a building and have walls on both sides and the walls at both sides (and the top) of the tunnel are considered outer walls of the building, which can have entrances that lead into it. Here the path and the service ways are not going through the building so as per OSM wiki, i gave covered=yes (it is usually open at least on one side) Here is the OSM wiki link, https://wiki.openstreetmap.org/wiki/Key:covered#covered=yes kindly correct me if i am wrong.