(form "20050" (size 38 11)
  (heading "SELECT STRING FILE SOURCE")
  (label (position  2  3) (text "Location"))
  (label (position  2  4) (text "ID"))
  (label (position  2  5) (text "Range"))
  (label (position  2  6) (text "Field"))
  (label (position  2  8) (text "Constrain data?"))
  (field "location" (position 10  3) (display_length 26) (input allowed)
    (translate lower) (null allowed) (max_length 26)
    (file (link "id") (extension "*.str"))
  )
  (field "id" (position 10  4) (display_length 16) (input allowed)
    (translate upper) (format real_8) (null disallowed) (max_length 16))
  (field "range" (position 10  5) (display_length 26) (input allowed)
    (format range) (null disallowed) (max_length 26))
  (field "field" (position 10  6) (display_length  3) (input allowed)
    (low_bound 1) (high_bound 100)
    (format integer_4) (null disallowed) (max_length 3))
  (field "constrain" (position 18  8) (display_length  1) (input allowed)
    (value_in "Y" "N")
    (translate upper) (null allowed) (max_length 1))
  (default_buttons)
)