Object Oriented Software Engineering   View all facts   Glossary   Help | 
| subject > event > external event | 
| external event comparison table | |||
| Subject | is a kind of | cause | has definition | 
|---|---|---|---|
| event | subject | a system or object to change from one state to another | In a state diagram, something that causes a system or object to change state. May be a message, the passage of elapsed time, a condition becoming true, or completion of an activity | 
| external event | event | most transitions in a state diagram | 
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