Context Mapping in Domain-Driven Design (DDD)

Context Mapping is a crucial aspect of Domain-Driven Design (DDD) that helps teams understand the relationships and boundaries between different bounded contexts within a software system. By visualizing these contexts, teams can make informed decisions about system architecture, integration, and domain logic.

2.1 Bounded Context

A bounded context defines the boundary within which a specific model is defined and applicable. It helps in managing complexity by isolating domains.

2.2 Context Map

A context map is a visual representation that illustrates the relationships and interactions between different bounded contexts. It provides clarity on how different parts of the system communicate and integrate.

2.3 Context Mapping Patterns

• Partnership
• Shared Kernel
• Customer/Supplier
• Conformist
• Anticorruption Layer

Step 1: Identify Bounded Contexts

Identify all the bounded contexts in your system. This often involves analyzing domain models and understanding the different areas of functionality.

Step 2: Define Relationships

For each bounded context, define its relationships with other contexts. Use context mapping patterns to establish how they interact.

Step 3: Create the Context Map

Visualize the bounded contexts and their relationships in a context map. This can be done using diagrams or specialized mapping tools.

Step 4: Review and Iterate

Regularly review and update the context map as the system evolves. This ensures that your mapping remains relevant and accurate.

graph TD;
                A[Identify Bounded Contexts] --> B[Define Relationships];
                B --> C[Create Context Map];
                C --> D[Review and Iterate];

• Involve cross-functional teams in the context mapping process.
• Use visual aids to enhance understanding and communication.
• Keep the context map updated with changes in the domain or architecture.
• Document decisions made during the context mapping for future reference.