HTML
XHTML 5
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="sv" lang="sv">
<head>
<meta charset="UTF-8" />
<title>Test</title>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" />
</head>
<body>
</body>
</html>
Mer info:
http://www.xhtml.com/en/future/x-html-5-versus-xhtml-2/#x5
http://html5doctor.com/html-5-xml-xhtml-5/
Serving XHTML with the Right MIME Type588
http://www.w3.org/TR/xhtml-media-types/
http://www.html-5.com/changes/no-html5-dtd.html
http://www.neocortext.net/x-html5/index.html
http://stackoverflow.com/questions/256953/html-5-versus-xhtml-1-0-transitional
http://www.w3.org/TR/xhtml-modularization/dtd_module_defs.html
http://www.w3.org/TR/xhtml-media-types/#application-xhtml-xml
http://www.w3.org/2003/01/xhtml-mimetype/
http://www.w3.org/TR/xhtml1/
http://stackoverflow.com/questions/2662508/html-4-html-5-xhtml-mime-types-the-definitive-resource
http://sv.wikipedia.org/wiki/XHTML
http://sv.wikipedia.org/wiki/XML-schema
http://en.wikipedia.org/wiki/XHTML
http://en.wikipedia.org/wiki/XHTML#XHTML5
http://en.wikipedia.org/wiki/Internet_media_type
http://webdesign.about.com/cs/xhtmlxml/a/aa013100a.htm
http://webdesign.about.com/od/htmltags/a/bltags_stylemod.htm
http://www.sitepoint.com/web-foundations/mime-types-complete-list/
http://en.wikipedia.org/wiki/MIME