Time based movement

[Livealot]

In the tutorial video describing the differences between Absolute and Relative movement using the SplineController, it's mentioned that there's a 3rd way to control motion with time, and that there are dedicated functions to do that. Could you please point out those api functions? As a new user, I'm having trouble finding them or the documentation of how to implement time-based movement, which is the approach I'd like to use.

Thanks!