When setting up your flowcharts, you may find that you need to use a component as an input or output in a discipline that does not support it. For example, you may want to use a camera cache component in a set dressing sequence, but camera cache can only belong to a shot.
To do this, you can set a discipline to be a "child" of another discipline. This will allow you to have a discipline (parent) that contains a different discipline (child). The parent discipline can then connect to its own inputs/outputs and also the inputs/outputs of the child discipline.
To find out more, see Parent and child disciplines.