The `<switch>` needs to be extended by an attribute `@ratio` to describe the opening angle of the switch, which is currently not possible to model. Further, the switch is missing an information about the type of rail it consists of. ## Links * Forum discussion * Dominik Looser, 13.10.2025 : [https://www.railml.org/forum/index.php?t=msg&th=1099&start=0&] * Gitlab issues * #685 * Wiki documentation * IS:switchIS: [https://wiki3.railml.org/wiki/IS:switchIS] ## Proposed solution railML 3.4 It is suggested to: 1. Add the attribute `@ratio` to `<switchIS>` and to `<crossing>` * The attribute is of type positive float and describes the denominator of the ratio of the switch / crossing * Typical values are "18.5", "14", "12", "9", or "7.5" * The ratio describes the tangens of the switch angle at the end of the switch 2. For modelling the steel grade etc. please make use of existing element `<trackBed / rails / *Rail>`. There will be no new model or model extension.