When you process formal markup using dthelptag, you must use the -formal command-line option. For example, to process a formal markup file named Icons.ctg in verbose mode, enter this command:
dthelptag -verbose -formal Icons.ctg
The command option specifies the type of markup in the input file. The run-time file created by running dthelptag is always volume.sdl. The online format is identical whether you used shorthand or formal markup.