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Specifies that, when the statechart leaves and then returns to a region, the statechart enters the highest-level substates that were active when the statechart left the region.

To use the Shallow History pseudostate, place this pseudostate in a region and then create a transition from a state to this pseudostate.

Note  Statechart history is erased after the statechart terminates.

You can create multiple incoming transitions to this pseudostate, but you cannot create any outgoing transitions from this pseudostate.

The Shallow History pseudostate returns to the highest-level substates that were active when the statechart left the region. To return to the lowest-level substates, use the Deep History pseudostate.