Activity Output
Some activities produce output. Activities have access to any data that is output from previously executed activities in the process definition. An activity’s output is placed into a process variable with the same name as the activity (with a dollar sign placed in front of the name to indicate it is a process variable).
Activities can use output from previously executed activities by mapping data from the process variable to the activity’s input. For more information about the Input tab and mapping process data to an activity’s input, see Input.