Systems and Domains. Triplet Sons of Different Mothers
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The domain model of an application describes the organization and partitioning of the business logic and rules. The business can look at that model and recognize itself. This is a good thing; but it's only part of the problem. An application is a system that connects the business domain model, the technical domain, and the specific use cases of a particular application. These three aspects of an application are often at odds with each other because they have opposing needs and affordances. It is the job of the System Architecture to balance those forces allowing these competing application aspects to work in harmony. Getting this right is critical to the lifecycle of the application and is an essential element in creating well-crafted applications.
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Systems and Domains. Triplet Sons of Different Mothers
Uncle Bob (Robert C. Martin)
Robert Martin (@unclebobmartin) is Master Craftsman at 8th Light, Skills Matter instructor and author of a range of books (as well as hundreds of articles), including: Clean Code: A Handbook of Agile Software Craftsmanship as well as his most recent, Clean Architecture: A Craftsman's Guide to Software Structure and Design.