BPMN, which stands for Business Process Model and Notation, is a diagramming language for business process models. It is important not because it is superior in every way to other process notations, but because it is a multi-vendor standard, maintained by the Object Management Group (OMG), and widely adopted by modelers and tool vendors alike. This book is more than a dictionary of BPMN’s shapes and symbols. It offers a unique approach to understanding and mastering the process modeling standard, based on two fundamental principles。