Player can, under certain circumstances, re-allocate any points, xp, or whatever else describes their advancement to try a different kind of character without having to start the whole game over.
Alternate names: Character reset
Name variations: Redistribution, Reallocation
The first video game about Respecialization was released in 1994.
Does not normally cover actually changing your class as well, but there are few cases where it is a side effect. Class change is usually possible depending on at what stage class is selected and if class affects your appearance. If it changes appearance, class change is unlikely to be possible with respec, if it doesn't, then it likely is.