What is domain logic?

Question

What is domain logic? The Wikipedia page for domain logic redirects to business logic. Are they the same thing, and, if not, how do they differ?

Answer 1

Domain logic applies to the problem domain, e.g. "order processing". Domain logic is about the entities you work with (the object model), and their relationships.

Business logic contains rules specific to your context, e.g. "orders from customers of group X are to be processed using discount Y when exceeding amount Z". Business "logic" is about encoding facts about your business (or the business of the customer who uses the program).