event
A type of noteworthy occurrence that has a location in time and space.
See also state machine, transition, trigger.
Semantics
An event is something that happens during execution of a system that is worth modeling. Within a state machine, an occurrence of an event can trigger a state transition. An event has a (possibly empty) list of parameters that convey information from the creator of the event to its receiver. The time at which the event occurred is implicitly a parameter of every event. Other parameters are part of the definition of an event.
An occurrence (instance) of an event has an argument (actual value) corresponding to each event parameter. The value of each argument is available to an action attached to a transition triggered ...
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