Software → Software Design
Domain Diagram
A visual model of important domain concepts, behaviours, rules, and relationships used to build shared understanding.
Motivation
A Domain Diagram helps domain experts and engineers explore and communicate the conceptual structure of a problem space.
Notation
The notation can be informal or UML-inspired. Clarity and agreement are more important than strict notation.
Practical use
Show key concepts, relationships, cardinalities, lifecycle rules, and boundaries. Keep implementation and database details out unless they clarify a domain decision.