The Conceptual Domain Model is a structured specification of the relevant concepts of the system domain. It captures the relevant concepts and their relationship to each other, as well as the most important attributes of the concepts. It is often executed as a UML class diagram and can be an input to the tasks that define the architecture of the system.

The model does not usually contain any elements specific to multi-agent systems. These are added later on in the artefacts that pertain to the design of the architecture. Operations are also not part of the conceptual domain model.