SDF File

     (file, database) A text file that contains fixed-length database records
     with each record separated by a carriage return/linefeed pair (CHR(13) +
     CHR(10)) and terminated with an end of file mark (CHR(26)).  Each field
     within an SDF file is fixed-length with character strings padded with
     trailing spaces and numeric values padded with leading spaces.  There
     are no field separators.