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Introduction to 492 and Decoupling
Weak Dependencies
Sometimes a part only requires that another part exist. That is, it does not call on any methods the part (just passes it along).
We call this a
weak dependency
between the parts.
For example, in our
browser
the main part could pass the AST part from the Parse part to the Display part.
UML does not have a notation specifically for weak dependency, but you can simply annotate a dependency arrow with the label "weak".
José M. Vidal
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