Can I trust `direction` parameter with `/stations/:id/departures`?

[funwithtriangles]

Often the final station for a line is closed and the train is terminating one stop earlier. If I were to set the direction parameter for /stations/:id/departures, will it only return trains ending there, or will all trains in that general direction be returned?

If I'm only interested in a certain direction, I feel like it might be safer to not use the direction parameter and just filter the results based on platform number?

[derhuerst]

I think you can't always trust it, as it is a string defined by someone authoring the schedule.

some remotely related threads from hafas-client:

• Can I trust direction parameter with /stations/:id/departures? #29
• Destination sometimes missing in departure result public-transport/hafas-client#273