This document discusses domain-driven design (DDD), which is an approach to software development that focuses on modeling the core domain and business logic of an application. It emphasizes creating a model that reflects the reality and complexity of the business domain. This document also provides links to additional resources on DDD, including a presentation and open source project implementation.

18. DDD
http://www.slideshare.net/beakmark/ddd-396388

34. http://github.com/koic/party-mail