What is domain in domain centric architecture?

Domain-driven design articulates a number of high-level concepts and practices. Of primary importance is domain, the subject area to which the user applies a program is the domain of the software. A software’s domain governs its context, the setting in which a word or statement appears that determines its meaning.

The domain layer is a collection of entity objects and related business logic that is designed to represent the enterprise business model . The major scope of this layer is to create a standardized and federated set of objects, that could be potentially reused within different projects.

Domain-driven design is the idea of solving problems of the organization through code . The business goal is important to the business users, with a clear interface and functions. This way, the microservice can run independently from other microservices.

Domain Services (or just Services in DDD) is used to perform domain operations and business rules . In his DDD book, Eric Evans describes a good Service in three characteristics: The operation relates to a domain concept that is not a natural part of an Entity or Value Object.