An XHTML Tutorial That Does Not Assume HTML?

stevelinton writes "I am looking for a tutorial similar to Dave Ragget's excellent HTML tutorial(s), but for XHTML 1.1. I am NOT looking for a "HTML to XHTML" conversion tutorial. I want to teach a class XHTML 1.1 from day 1, without assuming that they know any HTML at all. Does anyone know of such a thing?"