SysML v1/UAF/UML Model Element Descriptions UAF 1.3 elements Current: Rule Rule DescriptionAn abstract grouping for all types of constraint (i.e. an Operational Constraint could detail the rules of accountancy best practice).Architecture FrameworkUAF 1.3, DoDAF 2.0, MODAF, NAF, NAF 4.0ExtensionUML Constraint ×