"In the beginning, there was HTML, and it was good. Then, after some time had passed, there was a lot of HTML, and it was not very good at all. Then, after some more time had passed, there was XHTML, and it was better, though often not as good as it could have been."
"creating semantically rich and structurally sound websites that you, your visitors, and passing search engines will all appreciate."
"Mastering HTML isn’t just about knowing every tag that’s available and what it means.Equally important is knowing about HTML—that is, understanding what tags and attributes are and how to use them, grasping the differences between HTML and XHTML, knowing what a doctype is and how to read it, and so "