Arrows leaving a box on the right side are outputs. Outputs are the data or objects produced by the function. Arrows connected to the bottom side of the box represent mechanisms. Upward pointing arrows identify some of the means that support the execution of the function. Other means may be inherited from the parent box.
Mechanism arrows that point downward are call arrows.
Standard arrow positions are shown in Figure 3. Supporting information concerning the function and its purpose shall be addressed in the text associated with the diagram. A diagram may or may not have associated text. Arrow Positions and Roles 3.2.2.2 Labels and Names Boxes represent functions that show what must be accomplished. The arrows identify data or objects needed or produced by the function.