Can you list the main components and their roles in the Domain layer architecture according to Clean Architecture?

In the Domain layer according to Clean Architecture, the main components and their roles are as follows:

• Entities — business objects with business rules that do not depend on external layers. They encapsulate the core logic of the domain.

• Use Cases — implement specific business operations, coordinate the work of entities, and manage data flow between layers.

• Repositories interfaces — abstractions for data access, define contracts for retrieving and saving data, and do not depend on specific implementations.

Thus, the Domain layer contains pure business logic and does not depend on infrastructure or UI, which ensures high testability and flexibility.