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Executable UML: A Foundation for Model-Driven Architecture by Marc J. Balcer, Stephen J. Mellor

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3.1. Domains

Domains represent the different subject matters that we need to understand to build a system.

Definition: A domain is an autonomous, real, hypothetical, or abstract world inhabited by a set of conceptual entities that behave according to characteristic rules and policies.

For a given system, we first identify the several domains that make up the system as a whole. Generally, systems comprise domains such as an application, a bookstore for example; some implementation technologies, such as Java, HTML, a relational database, and XML; and some intermediate abstractions, such as a Web GUI, messaging, and workflow.

We then understand and model the application and intermediate abstractions using executable UML and apply various implementation ...

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