#arrow.mark__pointer  a mark to indicate a direction or relation
  supertype:  mark.written_symbol  a written or printed symbol (as for punctuation); "his answer was just a punctuation mark"
  part:  shaft  a line that forms the length of an arrow pointer
  part:  point.mark__head  a V-shaped mark at one end of an arrow pointer; "the point of the arrow was due north"

No statement uses or specializes arrow.mark; click here to add one.