Example:
The beginning of a lifting operation, the end of a measurement activity, the midpoint between beginning and end of an activity.
Scope note:
An 'event' doesn't need to be temporally connected. For example, several instances of switching on a heater over a week may be represented by a single 'event' individual; it will occupy a non-singular 'instant region'. The details of a singular event part may be modelled by relating the event to 'instant' individuals.
Event is close in meaning to BFO's 'process boundary', and to DOLCE's 'achievement'.
