If you get one ticket for the whole journey then it's the provider's responsibility to get you to your destination, even if you miss a connection due to a delay.
If you have bought multiple tickets covering the journey, there are a few European agreements that may be relevant in the event of a missed connection:
- Connections between certain high speed services allow you to 'Hop on the next available train' (HOTNAT) if both services are members of the Railteam alliance
- Connections between most services on international journeys are protected by the newish 'Agreement on Journey Continuation' (AJC)
It's definitely confusing and it's far from perfect, but the situation is improving.
If you have bought multiple tickets covering the journey, there are a few European agreements that may be relevant in the event of a missed connection:
- Connections between certain high speed services allow you to 'Hop on the next available train' (HOTNAT) if both services are members of the Railteam alliance
- Connections between most services on international journeys are protected by the newish 'Agreement on Journey Continuation' (AJC)
It's definitely confusing and it's far from perfect, but the situation is improving.