I have reworked all four train stations in Aachen. Before, the stations showed up several times in the map, as each track had a node tagged as railway=station or railway=halt. I have changed these nodes to railway=stop.
It would be nice if someone with more experience could review my changes.
Discussion
Comment from Grillo on 9 January 2010 at 04:34
I usually have this problem when tagging bus stations. Should every stop in a spread out station count as a single station or should the separate stops just be bus stops? Then how do we decide which of them is the main station? Maybe this could be solved as a relation in some way? It would make sense to create a relation as the bus or train station, and put the separate stops inside that relation. As far as I know, relations don't work that way yet.