Module Design and Implementation

boxes are the attributes of the class. Under that are the methods, with the class 

methods underlined. The diagram uses the open arrow to show inheritance between 

BOA::Logger::Enhanced and BOA::Logger. The dashed arrow from BOA::Network 

to BOA::Logger::Enhanced says that BOA::Network uses BOA::Logger::Enhanced.

Figure 3 2. UML class diagram example

If this small introduction piques your interest, I suggest you invest in a good 

book on the UML

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 and give it a try on your next project.

13.  There are many to choose from, but I've found The Unified Modeling Language User Guide by 

Booch, Rumbaugh, and Jacobson (Addison Wesley) to be readable and engaging.

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