■勧告等
HTML 4.01 http://www.w3.org/TR/html401/
XHTML 1.0 http://www.w3.org/TR/xhtml1/
XHTML Basic http://www.w3.org/TR/xhtml-basic/
XHTML 1.1 http://www.w3.org/TR/xhtml11/
XHTML 2.0 (Working Draft) http://www.w3.org/TR/2002/WD-xhtml2-20021211/
ISO/IEC 15445 (ISO-HTML) http://woodworm.cs.uml.edu/~rprice/15445/15445.html
JIS X 4156 (JIS-HTML) http://www.y-adagio.com/public/standards/jis_html/toc.htm
上記勧告の邦訳など http://www.doraneko.org/webauth/