Abstract

[Revised translation of a manuscript originally published in German in Zeitschrift fur Naturforschung 54a, 2--10 (1999) and dedicated to Georg Sussmann on the occasion of his seventieth birthday.] We discuss an ontological model suggested by quantum physics, in which the notion of events is of central significance. The conventional objects are considered as causal links between events. Localization in space-time refers primarily to events, not to objects. The intrinsic indeterminacy forces us to consider both possibilities and facts, corresponding to the distinction between future and past. In presently existing theories, the definition of individual events and their localization properties depends on asymptotic arguments adapted to prevailing situations.