"UML State chart" . "entry actions, exit actions" . "orthogonal regions" . "state machine diagrams" . "UML state machine" . "UML state charts" . "entry and exit actions" . . "superstates" . . "UML state machine#Hierarchically nested states" . . "State diagrams" . "UML statecharts" . . "UML state machine#Basic UML state diagrams" . "hierarchically nested states" . . "'''hierarchical state machines'''" . . "hierarchical state machines" . . "state diagram" . "state and transition explosion" . "UML state machine" . "UML" . "state diagrams" . "state machines" . "event" . . "actions" . . . .