What does Bounded Context mean in DDD?

In Domain-Driven Design (DDD), a Bounded Context is a central pattern that defines a clear boundary within which a particular domain model is applicable. This boundary encapsulates the entities, value objects, aggregates, services, and repositories that belong to a specific domain or subdomain, ensuring that the model remains coherent and consistent within that context.

Key Points about Bounded Context:

1. Definition and Purpose:

   • A Bounded Context is a logical and physical boundary around a coherent and consistent domain or subdomain[4][7].
   • It helps manage complexity by dividing a large system into smaller, more manageable parts, each with its own model and ubiquitous language[3][6].

2. Ubiquitous Language:

   • Within a Bounded Context, a shared and precise vocabulary (ubiquitous language) is used to describe the domain concepts and rules. This language is consistent and specific to the context, facilitating clear communication among stakeholders, developers, and domain experts[3][4][7].

3. Autonomy and Modularity:

   • Bounded Contexts are designed to be autonomous and loosely coupled with other contexts. This autonomy allows each context to evolve independently, reducing the risk of unintended consequences from changes in other parts of the system[4][5][7].

4. Integration and Relationships:

   • While Bounded Contexts are independent, they often need to interact with each other. This interaction is managed through well-defined interfaces and contracts, ensuring that the integration does not compromise the integrity of each context's model[3][10].
   • Various patterns, such as shared kernel, anti-corruption layer, and open host service, are used to manage these interactions and maintain the boundaries between contexts[7][10].

5. Strategic Design:

   • Bounded Contexts are a key part of DDD's strategic design, which focuses on dividing a large domain into smaller, more manageable contexts. This division he...