This section is only for those of us who want to write "good" HTML. XHTML is just that next level up.
Many pages on the internet contain "bad" HTML, which work fine in most browsers on most computers (even if it does not follow the HTML rules). Unfortunately, today's market consists of different browser technologies. Some browsers run on computers, and some browsers run on mobile phones or other small devices. Smaller devices often lack the resources or power to interpret "bad" markup.
XML is a markup language where documents must be marked up correctly, clean and be "well-formed". If you want to study XML, well, that's another tutorial!
By combining the strengths of HTML and XML, XHTML was developed. XHTML is actually HTML, redesigned as XML. The next few pages will outline the XHTML regulations that you can perform to make your webpages compatible with more devices than just a computer.
