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UML cheat sheet

Relationships

Relationships is one of the easier things to forget about UML.

Association

Represents the static relationship shared among the objects of two classes.

Composition

It’s a strong has relationship. The black arrow points to the owning side.

Aggregation

Is a has relationship. Aggregation uses the diamond on the container with the other side on the contained.

Realization

A realization relationship is the client implements or executes the behaviour of the supplier.

Dependency

Is a weak bound, usually when an entity uses other as a function argument or a local variable.

Generalization

The generalization is an inheritance relationship. The arrow points to the base class.


Default Values

Default values are expressed in a natural way I bet most of the developers would be intuitive about:

 - foo : int  = 0

Constants

Constants are expressed through a “convention”, all CAPITAL letters should be used.

 -  MY_CONSTANT : int = 1

References

  • http://pages.cs.wisc.edu/~hasti/cs302/examples/UMLdiagram.html
  • https://en.wikipedia.org/wiki/Class_diagram