SDF is a freely available documentation system. Based on a simple, readable markup language, SDF generates high quality output in multiple formats, all derived from a single document source. Supported output formats include HTML, PostScript, PDF, man pages, POD, LaTeX, SGML, MIMS HTX and F6 help, MIF, RTF, Windows help and plain text. If you want to: publish documents or reports on the Web or in multiple formats; maintain a large documentation suite using rule-based formatting and hypertext generation; embed documentation in source code or pretty print source code, then SDF may be for you. Perl 5.003 or later is required.