A Domain Model is a conceptual representation of the entities, attributes, relationships, and rules of a particular problem domain, independent of any specific software implementation. It captures the shared vocabulary and structural constraints that stakeholders agree describe the domain, serving as a blueprint for data schemas, APIs, and system behaviour. Standardised domain models enable interoperability by giving distinct systems a common semantic reference.
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- Domain models express the ubiquitous language of a domain, mapping concepts to classes, attributes, and associations with explicit constraints. They guide schema design and API contracts, and when published as standards they let independent systems exchange data with shared meaning.