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Access submission.metadata.Node from any Javascript rule to identify the current validation node.
It is recommended that you use a Calculated Value Rule (found on the Data tab) of a hidden Text Component to store this value. You can then use Simple Conditionals to show or hide components based on that value. Always remember to make sure Clear Values When Hidden when showing and hiding controls. If this option is checked, any data elements in the control will be cleared when visibility changes.