  IF $variable(rav$margin, nonlocal) THEN
    "$FORMAT=OFF
    VAR
      rav$margin: (XREF) integer
    VAREND
    "$FORMAT=ON"
  ELSE
    "$FORMAT=OFF
    VAR
      rav$margin: (XDCL) integer = 0
    VAREND
    "$FORMAT=ON"
  IFEND
