Most of my past posts about DMN have assumed that the reader knows what it is and may be using it already.  But there is undoubtedly a larger group of readers who have heard about it but don’t really understand what it’s all about.  And possibly an equally large group that have heard about it from detractors and have some misconceptions.  So in this post I will try to explain what it is and how it works.

DMN, which stands for Decision Model and Notation, is a model-based language for business decision logic.  Furthermore, it is a vendor-neutral standard maintained by the Object Management Group (OMG), the organization behind BPMN, CMMN, and other standards.  As with OMG’s other business modeling standards, “model” means the names, meaning, and execution behavior of each language element are formally defined in a UML metamodel, and “notation” means that a significant portion of the language is […]