#window_frame  the framework that supports a window
  supertype:  #framework__frame__framing  a structure supporting or containing something
  part of:  #window
  part:  #jamb  upright consisting of a vertical side member of a door or window frame
  part:  #windowsill  the sill of a window; the horizontal member at the bottom of the window frame

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