I've had success with xhtml and xslt processing on the server-side. The fact that it's xhtml is incidental; that it's xml-valid means I can use a wealth of esta

I've had success with xhtml and xslt processing on the server-side. The fact that it's xhtml is incidental; that it's xml-valid means I can use a wealth of established tools to modify the content, and easily write my own. I don't mind too much about xml support in the browser, although I've found xslt to still be supported in chrome - e.g. for rendering RSS feeds as HTML.