SysML v1/UAF/UML Model Element Descriptions UML elements Current: Function Behavior Function Behavior The function behavior allows modeling external functions that take only inputs and produce outputs. It has no effect on the specified system.To create a function behaviorIn the Model Browser, right click any root package in your model, in the figure below the root package is Car.In the shortcut menu, select Create Element > Function Behavior .Example of a package importing a function. Related Pages Formatting symbolsSpecification windowModel ElementsSequence diagramBehaviorFunction ×