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Domain Driven Design | ABP.IO Documentation

ABP provides an infrastructure to make Domain Driven Design based development easier to implement. DDD is defined in the Wikipedia as below:

Domain-driven design (DDD) is an approach to software development for complex needs by connecting the implementation to an evolving model. The premise of domain-driven design is the following:

• Placing the project's primary focus on the core domain and domain logic;
• Basing complex designs on a model of the domain;
• Initiating a creative collaboration between technical and domain experts to iteratively refine a conceptual model that addresses particular domain problems.

ABP follows DDD principles and patterns to achieve a layered application model which consists of four fundamental layers:

• Presentation Layer: Provides an interface to the user. Uses the Application Layer to achieve user interactions.
• Application Layer: Mediates between the Presentation and Domain Layers. Orchestrates business objects to perform specific application tasks. Implements use cases as the application logic.
• Domain Layer: Includes business objects and the core (domain) business rules. This is the heart of the application.
• Infrastructure Layer: Provides generic technical capabilities that support higher layers mostly using 3rd-party libraries.

DDD mostly interest in the Domain and the Application layers, rather than the Infrastructure and the Presentation layers. The following documents explains the infrastructure provided by the ABP to implement Building Blocks of the DDD:

• Domain Layer
  • Entities & Aggregate Roots
  • Repositories
  • Domain Services
  • Value Objects
  • Specifications
• Application Layer
  • Application Services
  • Data Transfer Objects (DTOs)
  • Unit of Work

See the Implementing Domain Driven Design book as a complete reference. This book explains the Domain Driven Design and introduces explicit rules and examples to give a deep understanding of the implementation details.

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