SysML v1/UAF/UML Model Element Descriptions UAF 1.3 elements Current: Phases Phases DescriptionsAn abstraction relationship that exists between a Phaseable Element and an Actual Strategic Phase that it is assigned to. Architecture FrameworkUAF 1.3, DoDAF 2.0, MODAF, NAF, NAF 4.0ExtensionsAbstraction ×