W3C, HTML5, 42
Yes Franck (who pinged me by email with an invalid sender's email address so I can't reply...), I am the one who wrote that. Quite long before others, right.
" There is a fourth way. The fourth way should be called xHTML 5 because it should not be a super-strict-XMLization of HTML produced by a bunch of XML gurus on crack (no kidding, XML gurus must be on crack to make a monster like XML Schemas, but that's another "considered harmful" debate), but a real and fair followup to HTML 4. It's xHTML and not XHTML nor Xhtml because the important part is HTML, not the X. "