Event (UML)

An event in the Unified Modeling Language (UML) is a notable occurrence at a particular point in time.

Events can, but do not necessarily, cause state transitions from one state to another in state machines represented by state machine diagrams.

A transition between states occurs only when any guard condition for that transition are satisfied.

Unified Modeling Language
Actors
  • Organizations
    • Object Management Group
    • UML Partners
  • Persons
    • Grady Booch
    • Ivar Jacobson
    • James Rumbaugh
Concepts
Object oriented
  • Object-oriented programming
  • Object-oriented analysis and design
  • Object-oriented modeling
Structure
  • Actor
  • Attribute
  • Artifact
  • Class
  • Component
  • Interface
  • Object
  • Package
  • Profile diagram
Behavior
  • Activity
  • Event
  • Message
  • Method
  • State
  • Use case
Relationships
  • Aggregation
  • Association
  • Composition
  • Dependency
  • Generalization (or Inheritance)
Extensibility
  • Profile
  • Stereotype
Other
  • Multiplicity
Diagrams
Structure
  • Class
  • Component
  • Composite structure
  • Deployment
  • Object
  • Package
Behaviour
  • Activity
  • State Machine
  • Use case
Interaction
  • Communications
  • Sequence
  • Interaction overview
  • Timing
Derived languages
  • Systems Modeling Language (SysML)
  • UML eXchange Format (UXF)
  • XML Metadata Interchange (XMI)
  • Executable UML (xUML)
Other topics
  • Glossary of UML terms
  • Rational Unified Process
  • Comparison of UML tools
  • UML colors


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Famous quotes containing the word event:

    “It is known that Whistler when asked how long it took him to paint one of his “nocturnes” answered: “All of my life.” With the same rigor he could have said that all of the centuries that preceded the moment when he painted were necessary. From that correct application of the law of causality it follows that the slightest event presupposes the inconceivable universe and, conversely, that the universe needs even the slightest of events.”
    —Jorge Luis Borges (1899–1986)