sub twig {                                                              # use twig to manipulate elements
      my $infile = shift ;
      my $processed = FALSE ;
      our $twigObject = XML::Twig->new (
             twig_handlers     => {
                                   'TABLE' => \&get_tab,
                         'CTOC-ChapterTOC' => \&del_chaptoc,
                     'CTOC-ChapterTOCList' => \&del_chaptoc,
                    'STOC-SectionTitleTOC' => \&del_chaptoc,
             },
                  keep_atts_order => 1,
                    keep_encoding => 1,
                    pretty_print  => "indented",
      ) ;
      my $logname = LOGD . "/conv_logfile.txt" ;
      open(LOG, ">> $logname" ) || die(
           "Can't open \'$logname\'.\nStopped " );
      $twigObject->parsefile_inplace($infile, '.bak') || die(
          "WTF!! Something went wrong with the 'parse' " .
          "of \'$infile\'.\nStopped $!\n") ;
      $twigObject->flush() ;                                            # output back to original XML after Mods
      undef($twigObject) ;
      close(\*LOG) ;
      return(0) ;                                                       # back to main
}