/layers:domain

Assumes /layers:intro has been loaded for framework context.

The domain layer maps what exists in the real world independently of any product: the concepts, terminology, processes, relationships, and mental models users bring with them. This is observation, not design.

Critical distinction: Do not resolve contradictions at this layer. Contradictory, messy, inconsistent domain language is data — it signals where different user communities have diverged, and where the product will need to make deliberate choices. Resolution happens at the conceptual model layer.

Decisions this layer needs to make:

• What are the key concepts in this domain, and how do they relate?
• What language do people use — and where does that language conflict or diverge?
• Where are the natural seams where different communities use the same words differently?
• What events and processes structure the domain's activity over time?

Methods: