DTIF_Input_Converter

   The DTIF input converter converts a DTIF input file to an
   intermediate format that is then converted to the specified
   output file format. DTIF (Digital Table Interchange Format) is
   a standard format for the storage and interchange of tabular
   data files, such as those created by spreadsheet and database
   applications.

   If the DTIF input file is a newer version of the DTIF grammar
   than that understood by the DTIF front end, data represented by
   the new grammar elements is lost.

   The DTIF input converter does not resolve external references. A
   document syntax error in the DTIF input file causes a fatal input
   processing error. A document syntax error in the DTIF input file
   causes a fatal input processing error and conversion stops.