<https://www.bpminstitute.org/product/process-modeling-with-bpmn-part-2-face-to-face/#product>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.bpminstitute.org/product/process-modeling-with-bpmn-part-2-face-to-face/>