Last release of version 0.1.x of this library, which contained a large dataset of osm ids associated with perrons and tracks. These were really hard to maintain (because OSM doesn't provide any stable on its own). Therefore, future versions of this library will reference perrons and tracks with their IFOPT identifier instead, which is useful on its own already, and can also be mapped to OSM for those ways and relations that are also tagged with an IFOPT there.