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An object diagram represents a set of objects and how they relate to each other at a certain moment in time.
An object diagram is used to show a context (before or after an interaction between objects, for example).
For example, the diagram below presents a section of the general structure of motorcycles:
Elements of an object diagram
An object diagram includes the following elements:
  • object: represents a class instance.
    Remark: If a class diagram is opened, you can create an object from a class in this diagram (Drag and drop it from the "UML analysis" pane).
  • composite object: visually represents an object made of other objects. For example: a window that contains scrollbars, buttons, etc.
  • link: represents the relationship between different objects.
  • UML package: divides and organizes the diagram representation (in the same way that directories organize files). Each package can contain objects and composite objects.
For more details on the actions available on object diagrams, see Operations performed on object diagrams.
Minimum version required
  • Version 9
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Last update: 05/24/2023

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