I call such an ideal event an 'event-particle.' You must not think of the world as ultimately built up of event-particles.

That is to put the cart before the horse.

The world we know is a continuous stream of occurrence which we can discriminate into finite events forming by their overlappings and containings of each other and separations a spatio-temporal structure.

We can express the properties of this structure in terms of the ideal limits to routes of approximation, which I have termed event-particles.

Accordingly event-particles are abstractions in their relations to the more concrete events.