BPMN — compliance level to cover core elements/simple business modeling

The start of section 8 has the following which suggests 2 levels of compliance; however this opportunity has been missed in the conformance section: "First, there is the list of core elements that will support the requirement of a simple notation. These are the elements that define the basic look-and-feel of BPMN. Most business processes will be modeled adequately with these elements. Second, there is the entire list of elements, including the core elements, which will help support requirement of a powerful notation to handle more advanced modeling situations."

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