 BPDM provides abstract concepts as the basis for consistent interpretation of specialized concepts used by business process modelers.For example, the ordering of many of the graphical elements in a BPMN (Business Process Model and Notation) diagram is depicted by arrows between those elements, but the specific elements can have a variety of characteristics.For example, all BPMN events have some common characteristics, and a variety of specific events are designated by the type of circle and the icon in the circle.