When introducing domain-driven design practices to a brownfield project, you will notice that there is already a formed language for describing the business domain, and that the stakeholders use it. However, since DDD principles do not drive that language, it won’t necessarily reflect the business domain effectively. For example, it may use technical terms, such as database table names. Changing a language that is already being used in an organization is not easy. The essential tool in such a situation is patience. You need to make sure the correct language is used where it’s easy to control
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