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It will be a while before we can start using real HTML5, but because HTML5 is as much about defining current behaviour as it is about adding new, there is already a very large part available to us today. Here are the parts you can use today.

<!doctype html>

The simplified doctype is ierhaps the most iconic idea in HTML5. It turns out, the above code is all that’s needed to trigger standards mode. The validator understands it as well. Quite a change from the humongous HTML4 or XHTML doctype declarations, no?

<meta charset="utf-8">

<script>
 //your javascript
</script>

<style>
 // your css
</style>

HTML5 introduces a bunch of new elements that allow you to better describe your document:

<header>
<footer>
<nav>
<section>
<article>
<aside>