HTML5 DOCTYPE Declaration

This section describes the HTML5 DOCTYPE declaration statement - 'DOCTYPE html', which is much simpler than the HTML 4.01 version.

Since HTML5 is not based on SGML (Standard Generalized Markup Language) any more, it does not require any reference to a DTD (Document Type Definition) in the DOCTYPE declaration.

So the HTML5 DOCTYPE declaration statement is very simple:

<!DOCTYPE html>

Here is a very simple HTML5 document with the correct DOCTYPE declaration:

<!DOCTYPE html>
<html>
<head><title>Hello</title></head>
<body>Hello world!</body>
</html>

As a comparison, DOCTYPE declaration statements for HTML 4.01 are listed below:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
   "http://www.w3.org/TR/html4/strict.dtd">

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"
   "http://www.w3.org/TR/html4/frameset.dtd"> 

Last update: 2014.

Table of Contents

 About This Book

 Introduction of HTML

Introduction of HTML5 Features

 What Is HTML5?

 Differences between HTML5 and HTML 4

HTML5 DOCTYPE Declaration

 Adding Inline SVG Image in HTML5 Documents

 Adding MathML Formula in HTML5 Documents

 "article" and "section" Elements

 "header" and "footer" Elements

 "nav" and "aside" Elements

 "details" and "summary" Elements

 "figure" and "figcaption" Elements

 "audio" and "video" Elements

 HTML Document Structure and Content

 HTML Document and Elements Syntax

 References

 PDF Printing Version