UAF13 — Decision Nodes not a UAF element

Decisions within a process often conform to standards and require measurements to determine the quality of the decision. However, because the DecisionNode element is inherited without modification from SysML/UML, the <<ConformsTo>> relationship and <<MeasurableElement>> are not available on decision nodes. Adding a UAF DecisionNode as a MeasurableElement would improve traceability in the model.