=== XHTML 1.1: Module-based XHTML ===XHTML 1.1 evolved out of the work surrounding the initial "Modularization of XHTML" specification.
XHTML 1.0 je postal priporočilo inštituta World Wide Web Consortium (W3C) 26. januarja 2000, XHTML 1.1 pa 31. maja leto kasneje.