text: I had the following schema in mind:
  
  https://wiki.openstreetmap.org/wiki/Simple_Indoor_Tagging
  
  In this particular building, the corridors for levels 0 and 1 run similarly (if not identically). However, on level 2 the corridor is very different.
  
  I left that note primarily for myself, so that I can start doing indoor mapping here in the future, but feel free to work on it yourself if you want.