The Order entity has methods like CalculateTotal() and UpdateStatus(), which encapsulate business logic. The Money Value Object has methods like Add() and Subtract().

: Objects that describe things but have no conceptual identity (e.g., a color or a monetary amount). Aggregates

: Focuses on the implementation details (Entities, Value Objects, Services) to ensure the domain logic is isolated from technical concerns. Strategic Design

The requirements for a cargo's journey (origin, destination, arrival deadline).

Evans categorizes his approach into strategic and tactical patterns to manage both the big-picture architecture and the code-level implementation: WUR eDepot 1. Strategic Design

Responsible for representing business concepts, information about the business situation, and business rules. This is where the true value of the software lives .

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domain driven design eric evans ebook pdf 51

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