The .REQUIRE command allows you to process several DSR files at
    the same time and merge them in an output file.

    Format

      .REQUIRE  "filespec" (or 'filespec')

    Abreviated format

      .REQ  "filespec" (or 'filespec')

1 - Parameter

 filespec

    A file specification enclosed in quotation marks or apostrophes.
    If you just specify a file name, the default file type is .RNO.
    If you do not supply a full file specification, DSR uses your
    default device and directory. If you want to include (.REQUIRE)
    files from other devices or directories, you must specify the
    full file specification.