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    It turns out DDD doesn't tell much (as far as I know), if it tells anything, about how to deal with the requirements of the software. -- Why do you say that? DDD is a way to model software against business processes using an ubiquitous language (a language that the software engineer and business analyst can both understand and communicate with), so it impacts directly and profoundly on the software requirements. Commented May 12, 2017 at 1:10
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    BDD, on the other hand, is the "enlightened" form of TDD. Like DDD, it uses a (more or less) ubiquitous language that the business analyst and software developer can both understand. Its goal is to turn requirements into code. DDD's goal is to turn requirements into software design. The two techniques are not mutually exclusive, nor are they incompatible. Commented May 12, 2017 at 1:13
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    I agree @RobertHarvey. My point is that in what I've studied about it up to now, it doesn't seem to suggest a method for gathering and organising these requirements. It encourages the engagements of business people, the creation of the ubiquitous language and so on, so that it sheds light on how to pick a requirement and implement it focusing on the domain. I haven't seem up to now any DDD content actually suggesting a way to gather, organize these requirements so that they are ready to be used in the development process. I thought BDD could furnish this part Commented May 12, 2017 at 1:14
  • Neither BDD nor DDD have much to say about the requirements gathering process itself; that process is the subject of entire books. Commented May 12, 2017 at 2:25