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Software → Software Design

Domain Model

A representation of domain concepts, rules, behaviours, and relationships used to solve a business problem.

Motivation

A Domain Model captures the concepts and behaviour that matter to the business rather than mirroring storage tables or UI screens.

Important elements

A domain model may include entities, value objects, aggregates, domain services, policies, invariants, and domain events.

Common mistakes

Confusing the domain model with the database model.
Creating an anemic model made only of data containers.
Modeling implementation details that are not part of the domain.