So how deep are you into Domain Driven Design? Carl and Richard talk to David Rael about his work applying DDD principles to the systems his customers develop. David focuses in on the idea of the ubiquitous language, something Eric Evans admits he wishes he'd put earlier in his seminal book on DDD. The ubiquitous language is the assembly of all the terms needed and agreed upon about the particular domain that the application has being built for. Most of what you need to know to build an application lives in that language, and most of what can go wrong goes wrong there. Great, focused conversation from someone living the DDD life!