docbook
http://man.lupaworld.com/content/manage/ringkee/docbook.htm#id2810891
http://www.study-area.org/tips/docw/docwrite.html
http://www.worldhello.net/doc/docbook_howto/helloworld.html
http://www.worldhello.net/doc/docbook_howto/ar01s03s02.html
http://www-cs-faculty.stanford.edu/~knuth/programs.html
