#railing.barrier__rail  a barrier consisting of a horizontal bar and supports
  supertype:  #barrier  a structure or object that impedes free movement
  subtype:  #bar.railing  #fife_rail  #safety_rail  #taffrail
  part:  #ledger_board
  part of:  #bannister__banister__balustrade__balusters__baluster__handrail  a railing at the side of a staircase or balcony to prevent people from falling
     part of:  #balcony  a platform projecting from the wall of a building and surrounded by a balustrade or railing or parapet

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