What is the difference between a 'calling point' and a 'board / alight point'?

For a given journey, a 'calling point' is a station that the train stops at to let people on and off, but where the traveller remains on the train. Depending on the service, the train may not call at all the stations along the line.

A 'board or alight point' (also referred to as an 'interchange') is a station at which a traveller gets on or off the train.

The recommendation is to use the 'calling point' option as this will give you the best splits and only amend to 'board or alight point' is requested by your clients.