I'm sure you've heard people mumbling about XHTML and how it combines HTML and XML to create the "next generation" of HTML. I too had heard the mumbling, but actually had no idea what XHTML was... up until about 2 months ago. In this article, Mitchell gives us a quick run down of what XHTML is, some of its benefits, how it can be used, and what it looks like. He wraps up the article with a couple of XHTML examples.
I will assume that you are familiar with Hypertext Markup Language (HTML), which is the fundamental building block of the web. You should also know what XML and DTD's are. I will build on this foundation by comparing and contrasting the current version of HTML (version 4.0), with the latest version of XHTML, version 1.0.