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umlclass-diagramobject-diagram

Extracting an object diagram to a class diagram

Below, is the mapping of class diagram to object diagram correct? I can not seem to find a useful tutorial on object diagrams anywhere!

Here is the image

Solution

  • Technically Your Object Diagram is True

    Object diagrams are not used much as class diagrams. [ Although we are doing Object-Oriented not Class-Oriented Design-Programming, that is irony :-) ]

    Object Diagram is simple : Just show objects and the connections between them.

    And All Diagrams Should Have Purpose

    Why to use Object Diagram?

    • To make things more explicit? Such as what DataItem can be in real life?

    • Or you may start with object diagram, then find-discover classes from those objects?

    Why you map Class Diagram to Object Diagram?

    Ask, what I will get from drawing object this diagram,if you have good benefit-reason, Then you are on the right track. Go on... :-)

    For More Info:

    Object Diagrams are simple. Just look at the book:

    The Elements of UML 2.0 Style by Scott Ambler

    [ Chapter 13: UML Object diagram guidelines (3 guidelines) ]