PROTO HorizontalLine [
      exposedField SFString elementType "HLINE"
      exposedField SFBool   linebreak  FALSE
      
      exposedField SFBool     absolute    FALSE
      exposedField SFVec3f  position    0 0 0
  
      exposedField SFInt32  startLevel -1
      exposedField SFInt32  endLevel   -1
  
      exposedField SFFloat  width      1
      exposedField SFFloat  height     1
  
      exposedField SFColor  color      1 1 1
      exposedField MFString justify     [ "BEGIN" ]
  
  ] {