Congruency

• An object set is congruent if the common properties of the objects in an object set S coincide with the properties explicitly defined for S.

• Explicit properties – given in application model

• Common properties

  • Common relationship-set property: all objects participate
  • Common state-net property: all objects can be in state or transition
  • Common interaction property: all objects can interact the same

• Incongruent:

  • Overstatement: explicit property not common to all
  • Understatement: common to all but not explicit

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