Begivenhedstyper hvis omkostninger er angivet i profildatafilen, kaldes ægte begivenheder. Yderligere kan man angive formler for begivenhedstyper beregnet ud fra reelle begivenheder. De kaldes arvede begivenheder.
Event types whose costs are specified in a profile data file are called real events. Additionally, one can specify formulas for event types calculated from real events, which are called inherited events.