Domain-Driven Design

Domain-driven design (DDD) is the concept that the structure and language of software code (class names, class methods, class variables) should match the business domain.

• A Domain Model is a Map
• Bounded Contexts act as boundaries of Domain Concepts
• Business Invariants are always satisfied
• Aggregates are Modeled Processes
• Aggregates expose intentions to change the state of the domain
• Aggregates are gateways to state change
• Domain Events are Business Events
• Repositories abstract database access
• Abstractions reduce coupling
• Application Services orchestrate Domain Operations
• Domain Services are part of the Domain Model