What does Domain-Driven Design model?
DDD addresses complex business rules through shared language and models with explicit boundaries, developed with domain experts. A term has consistent meaning within a bounded context but can mean something else elsewhere.
A concrete example
A customer in sales need not share the same model as an account in billing. Discuss rules and boundaries first; DDD does not require splitting every application into microservices.
Sales.Customer ≠ Billing.AccountExplain it yourself
Which model should own an order cancellation rule, and why?
How to study this
Write your reasoning first. Check the original documentation, identify an assumption, then try a different example. Reading this page does not count as verified skill evidence.
Source and review
Original RealDeveloper explanation; last source check: .