SysML v1/UAF/UML Model Element Descriptions UAF 1.3 elements Current: Project Activity Action Project Activity Action Description The ProjectActivityAction is defined as a call behavior action that invokes the activity that needs to be preformed.Architecture FrameworkUAF 1.3, DoDAF 2.0, MODAF, NAF, NAF 4.0ExtensionCall Behavior Action, Activity ×