[openrailwaymap] Station importance

Hello everybody, for rendering, it would be nice to have any information about the importance of a station/halt. With this information, the renderer could render captions in different zoom levels or font sizes or decide which label is rendered in cases of collision. Currently we have the tag railway:station_category=1-7 for mapping the German railway station category [1]. But this is very german-specific, so we should think about a way to tag the importance of a station using generic rules that are independent from any country-specific categories. Should we use the existing tag railway:station_category=* and translate the German definitions, so that they can be applied internationally? This would have the advantage that German stations, that are already tagged with the existing tag, do not require any retagging. But using just numeric values is not so Or should we create a new tag a tag like railway:station_importance=* with some category values such as local/regional/international/... and leave the existing railway:station_category=* tag for mapping country-specific categories? Any ideas? Regards Alex [1] http://en.wikipedia.org/wiki/German_railway_station_categories