What is Domain Driven Design (DDD)?

Domain-driven design (DDD) is a way of building software that focuses on understanding and modeling the real-world problems that the software is trying to solve. It's like creating a blueprint for the software that is based on the knowledge and expertise of people who know the most about the problem domain, such as business experts, users, and engineers.

DDD helps to bridge the gap between the technical world of software development and the non-technical world of business and users. It creates a shared language, called a ubiquitous language, that everyone can understand. This shared language makes it easier for everyone to communicate about the software and ensures that the software is built to meet the real needs of the business and users.

Simplified explanation of domain-driven design (DDD):

Domain-driven design (DDD) is like creating a blueprint for software.

1. Understand the domain: DDD starts by understanding the problem domain, which is the specific field or area of knowledge that the software aims to address. This involves not only understanding the problem domain but also identifying the core business concepts, rules, and requirements.It requires collaboration with business experts, users, engineers and other stakeholders to fully grasp their needs and requirements.

2. Model the domain: Once the domain is understood, it is modeled using a shared language that is understandable to both technical and non-technical stakeholders. This shared language is called a ubiquitous language and serves as a blueprint for the software. The domain model represents the concepts and relationships in the problem domain.

3. Design the software: The software is then designed and implemented based on the domain model. DDD encourages the use of domain-driven patterns like Entities, Value Objects, Aggregates, Repositories, and Services to structure the code in a way that reflects the domain's natural boundaries. This ensures that the software is not only aligned with the needs of the problem domain but also that it is maintainable, extensible, and robust over time.