Chapter 9. Modules
The secret of all victory lies in the organization of the non-obvious.
—Marcus Aurelius
If you are using Java or C#, you are already familiar with Modules, though you know them by another name. Java calls them packages. C# calls them namespaces. Actually in Ruby you can use the module language construct to effect namespaces for classes. In Ruby’s case the DDD pattern name matches the name of the language construct. For the sake of our DDD context I will continue to call them Modules in most cases. It will be easy for you to map that name to the programming language term you regularly use. I won’t spend much time trying to explain technically what Modules do, because you probably figured that out long ago.
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