UDO

!begin_document

!docinfo [title]       Hello World in UDO
!docinfo [programname] hello_udo
!docinfo [author]      Example User
!docinfo [date]        2025

!begin_preamble
!tableofcontents
!end_preamble

!begin_node Introduction
This document demonstrates the UDO markup language.
UDO converts documents from its own markup format into
HTML, LaTeX, PostScript, RTF, and other output formats.
!end_node

!begin_node Greeting
!begin_quote
Hello, World!
!end_quote

This is a simple greeting written in !B UDO !b format.

!begin_itemize
!item UDO stands for Universal DOcument
!item It supports many output formats
!item Documents are written in plain text
!end_itemize
!end_node

!end_document