Tags & Taxonomies
Tags are handled differently in OSM, Transformap, and other sister projects. Usually free text, they are a bit more structured in OSM. As with other OpenStreetMap processes, tags can evolve to reach a structured consensus. See for example the syntactic convention for new OSM tags.
Since tagging is not critical yet to how we structure data, we’re leaving the discussion open as to how to model tags in IN COMMON, that would be interoperable with OSM and others.