Resources

HTML/XHTML

Basic Info
http://www.w3schools.com/xhtml/default.asp

Sources:
XHTML Tutorial/Info
XHTML code validator
Official Documentation

There are a few main points to remember with XHTML:

XHTML stands for EXtensible HyperText Markup Language
XHTML is aimed to replace HTML
XHTML is almost identical to HTML 4.01
XHTML is a stricter and cleaner version of HTML
XHTML is HTML defined as an XML application
XHTML is a W3C Recommendation
Documents must be well-formed
Element and attribute names must be in lower case
For non-empty elements, end tags are required
Attribute values must always be quoted
There are Mandatory XHTML Elements -- know what they are
There are THREE doctypes -- know what they are
Take notes/books with you to the competition -- NO previous tests

SAMPLE DOCUMENT:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>