Using events

Events originate in the analysis process as "happenings" within the system to which objects respond. Their concrete realizations are information entities carrying data about the occurrence they describe.

About this task

For designers, an event is a one-way, asynchronous communication between objects or between some external interface and the system (see Events and operations).

The following figure shows an event.

Event

You can specify an event using the following methods:

Classes and their statecharts can receive events defined in any package in the model. Cross-package inheritance of statecharts for reactive classes is not allowed.


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