Domain-Driven Design (DDD) is a software design discipline built around six core principles: developing a shared understanding of the domain guided by domain experts, formalizing that understanding into a Ubiquitous Language, expressing it in shared models, embracing essential complexity, separating complex domains into Bounded Contexts, and continuously refactoring models as understanding evolves. DDD is non-prescriptive and spans from micro-level code patterns to large-scale system reasoning, applied pragmatically where it has the most impact.
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