Does anyone know whether DB and/or OBB train-specific advance purchase tickets can be used on any reasonable local connecting service, as is the case in Britain if the local service is non-reservable, or are they 100% train-specific? Or is it at the discretion of train staff? The link with the reservation seems to be less rigid than here in that reservations aren't (with some exceptions) compulsory even for the inter-city part of the journey, so not having a reservation doesn't necessarily mean that you are free to choose any train.
Specifically, I have a ticket from Graz to Aachen using a RailJet train (reservation optional) from Graz to Wien Meidling and the night train (reservation compulsory) from Wien Hutteldorf to Cologne. It's a print-at-home ticket bought from the OBB website. Can I use any S-bahn train from Meidling to Hutteldorf, or only the one specified on the ticket? And at Cologne do I have to wait an hour for the Regional Express train to Aachen (this may be a result of my choosing the maximum connection time to ensure a secure connection in Vienna) or can I get an earlier train if there is one?
If anyone does know the answer, is it publicly documented anywhere, in English and/or German?
Specifically, I have a ticket from Graz to Aachen using a RailJet train (reservation optional) from Graz to Wien Meidling and the night train (reservation compulsory) from Wien Hutteldorf to Cologne. It's a print-at-home ticket bought from the OBB website. Can I use any S-bahn train from Meidling to Hutteldorf, or only the one specified on the ticket? And at Cologne do I have to wait an hour for the Regional Express train to Aachen (this may be a result of my choosing the maximum connection time to ensure a secure connection in Vienna) or can I get an earlier train if there is one?
If anyone does know the answer, is it publicly documented anywhere, in English and/or German?
