#parapet__breastwork  fortification consisting of a low wall
  supertype:  #munition__fortification  defensive structure consisting of walls or mounds built around a stronghold to strengthen it
  subtype:  #machicolation  a projecting parapet supported by corbels on a medieval castle; has openings through which stones or boiling water could be dropped on an enemy

No statement uses or specializes #parapet; click here to add one.