(pcb freeroute-empty.dsn
  (parser
    (string_quote ")
    (space_in_quoted_tokens on)
  )
  (resolution um 10)
  (unit um)
  (structure
    (layer F.Cu
      (type signal)
      (property
        (index 0)
      )
    )
    (layer B.Cu
      (type signal)
      (property
        (index 1)
      )
    )
    (boundary
      (path pcb 0  186690 -107950  129540 -107950  129540 -57150  186690 -57150
            186690 -107950)
    )
  )
)