Webel: Mathematica: CONVENTION: A '$doc$' prefix indicates a formatted documentation String helper. A '$doc$arg$' is for an argument, a '$doc$opt$' is for an option. A '$doc$ String may be used to create ::usage documentation via docF.
HelpM`: Use Webel MOpt and MArg objects to create ‘$doc$’ Strings for ::usage help Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: The Webel '$opt$' and '$arg$' help holder conventions for options and arguments in the Wolfram Language
Generate $doc$arg$ and $doc$opt$ Strings from Webel help Rules for use in ::usage Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: The Webel '$opt$' and '$arg$' help holder conventions for options and arguments in the Wolfram Language
Webel '$arg$' and '$opt$' support via the Doc` package Gallery Tutorial [TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models. Section SECTION: The Webel '$opt$' and '$arg$' help holder conventions for options and arguments in the Wolfram Language