Braking characteristics for speed aspects

As stated in the forum by Dirk Bräuer (1) there are two XML tree positions where the braking characteristics ("brakeType", "airBrakeApplicationPosition" and "minimumBrakePercentage") for a certain speed aspect may be defined, either at the 'speed profile' or at the 'speed change'.

There are good reasons for both variants, nevertheless railML should implement only one way.

(1) http://www.railml.org/forum/ro/?group=1&id=208