Objects defined by a unique, persistent identity rather than their attributes (e.g., a specific User account).
This is perhaps the most relevant concept for modern Microservices architecture. Evans taught us that a single model cannot exist for an entire complex system. Instead, we must define . A "User" in a "Shipping Context" is different from a "User" in a "Marketing Context." This insight prevents the "God Class" problem and defines the boundaries of Microservices perfectly.
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Available as a or EPUB through retailers like Amazon and Apple Books Domain-Driven Design: The First 15 Years
| Part | Title | Core Topics Covered | | :--- | :--- | :--- | | | Putting the Domain Model to Work | Why models matter; The three principles of making models work; Isolating the domain | | Part II | The Building Blocks of a Model-Driven Design | Entities, Value Objects, Services, Modules, Aggregates, Factories, Repositories | | Part III | Refactoring to Deeper Insight | Discovery and innovation; Breaking down large models; Supple design | | Part IV | Strategic Design | Maintaining model integrity; Context Maps; Distilling the core domain | Objects defined by a unique, persistent identity rather
A shared language cultivated by both developers and domain experts. It eliminates translation errors between code and business logic.
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