SysML v1/UAF/UML Model Element Descriptions UAF 1.3 elements Current: Resource Exchange Resource Exchange DescriptionAsserts that a flow can exist between Resource Performers (i.e. flows of data, people, materiel, or energy).Architecture FrameworkUAF 1.3, DoDAF 2.0, MODAF, NAF, NAF 4.0ExtensionUML Information Flow ×