Introduction
Head
Your Doctype tag will be:
<!DOCTYPE html>
that's it. Any or all can be upper case or lower case.
DOCTYPEs are required for legacy reasons. When omitted, browsers tend to use a different rendering mode that is incompatible with some specifications. Including the DOCTYPE in a document ensures that the browser makes a best-effort attempt at following the relevant specifications.
THE DOCTYPE
Charactor encoding
has now become shorter
<meta charset="UTF-8">
Language
For English
<html lang="en">
More at: Declaring Languages in HTML5
Link Tag
has also become shorter you not longer need to include text/css
<link rel="stylesheet" href="name.css">
Java Script
You no longer have to specify java script: text/javascript. Now its much simpler:
<script src="name.js"></script>
The Basics
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>A descriptive name for the page</title>
<link rel="stylesheet" href="name.css">
<script src="fixIE.js"></script>
</head>