So you know all about ubiquitous language, the relationship between an aggregate and a repository, and what a domain event is. You've mastered DDD right? Not so fast! Many of DDD's insights concern managing larger domain models and if you are just focusing on the tactical patterns you won't know when and how to apply DDD style domain modelling. In this presentation we look at modules, bounded contexts (including context mapping), distillation of the core domain, and large scale models for a domain.