====Historical Drivers====

Historical drivers access information that is time-stamped. 

Historical drivers are quite different to [[live driver|live drivers]] in structure. While live drivers are constantly running and feeding data to ARDI, historical drivers are only called when someone wants to look at a different point of time.

It's quite possible that you may have both a live driver and a historical driver pointed to the same source of information - particularly if it is a database or historian.