text: Tim, I'm not sure from your comments whether you are trying to report a fault (which is what these notes are for), or to annotate the map (which the OSM main site doesn't do). However, the University map at http://map.cam.ac.uk has extensive facilities for annotating the map and sending links to your annotated versions to other people. If this is regarding a problem, it would be helpful to discuss with the University map team first to make sure what you're doing doesn't break the University map, which comes from this data. In particular, entrances are highlighted on the University map when you show a University institution, and if one of your entrances is missing, we should fix that with reference to the institution database in the University rather than just in OSM.