UDO (markup language)

UDO is a lightweight markup language.

The acronym stands for Universal Document Output.

Much like the more recent reStructuredText, it is well-suited for writing documentation.

A corresponding free software program called udo can be used to convert a source document into other formats such as Apple-QuickView, ASCII, HTML, Texinfo, LinuxDoc-SGML, man page, Pure-C-Help, Rich Text Format, ST-Guide, LaTeX, Turbo Vision Help or Windows Help.

UDO is released under the GNU General Public License.