abdullahbutt · November 22, 2013 12:50
diff --git a/doctype_html b/doctype_html
 <!DOCTYPE html>
 <html>
 <head>
 <title>Title of the document</title>
 </head>

 <body>
 The content of the document......
 </body>

 </html>

 http://www.w3schools.com/tags/tag_doctype.asp

 The <!DOCTYPE> declaration is supported in all major browsers.
 Definition and Usage

 The <!DOCTYPE> declaration must be the very first thing in your HTML document, before the <html> tag.

 The <!DOCTYPE> declaration is not an HTML tag; it is an instruction to the web browser about what version of HTML the page is written in.

 In HTML 4.01, the <!DOCTYPE> declaration refers to a DTD, because HTML 4.01 was based on SGML. The DTD specifies the rules for the markup language, so that the browsers render the content correctly.

 HTML5 is not based on SGML, and therefore does not require a reference to a DTD.

 Tip: Always add the <!DOCTYPE> declaration to your HTML documents, so that the browser knows what type of document to expect.
 Differences Between HTML 4.01 and HTML5

 There are three different <!DOCTYPE> declarations in HTML 4.01. In HTML5 there is only one:
 <!DOCTYPE html>

 HTML Elements and Doctypes

 Look at our table of all HTML elements, and what Doctype each element appears in.
 Tips and Notes

 Note: The <!DOCTYPE> tag does not have an end tag.

 Tip: The <!DOCTYPE> declaration is NOT case sensitive.

 Tip: Use W3C's Validator to check that you have written a valid HTML / XHTML document!
 Common DOCTYPE Declarations
 HTML 5
 <!DOCTYPE html>
 HTML 4.01 Strict

 This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed.
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 HTML 4.01 Transitional

 This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed.
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 HTML 4.01 Frameset

 This DTD is equal to HTML 4.01 Transitional, but allows the use of frameset content.
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
 XHTML 1.0 Strict

 This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 XHTML 1.0 Transitional

 This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 XHTML 1.0 Frameset

 This DTD is equal to XHTML 1.0 Transitional, but allows the use of frameset content.
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
 XHTML 1.1

 This DTD is equal to XHTML 1.0 Strict, but allows you to add modules (for example to provide ruby support for East-Asian languages).
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">


 -----------------------------------------------------------------------------------------------------------------------------

 HTML Elements and Valid DOCTYPES

 http://www.w3schools.com/tags/ref_html_dtd.asp
 -----------------------------------------------------------------------------------------------------------------------------
	<!DOCTYPE html>
	<html>
	<head>
	<title>Title of the document</title>
	</head>

	<body>
	The content of the document......
	</body>

	</html>

	http://www.w3schools.com/tags/tag_doctype.asp

	The <!DOCTYPE> declaration is supported in all major browsers.
	Definition and Usage

	The <!DOCTYPE> declaration must be the very first thing in your HTML document, before the <html> tag.

	The <!DOCTYPE> declaration is not an HTML tag; it is an instruction to the web browser about what version of HTML the page is written in.

	In HTML 4.01, the <!DOCTYPE> declaration refers to a DTD, because HTML 4.01 was based on SGML. The DTD specifies the rules for the markup language, so that the browsers render the content correctly.

	HTML5 is not based on SGML, and therefore does not require a reference to a DTD.

	Tip: Always add the <!DOCTYPE> declaration to your HTML documents, so that the browser knows what type of document to expect.
	Differences Between HTML 4.01 and HTML5

	There are three different <!DOCTYPE> declarations in HTML 4.01. In HTML5 there is only one:
	<!DOCTYPE html>

	HTML Elements and Doctypes

	Look at our table of all HTML elements, and what Doctype each element appears in.
	Tips and Notes

	Note: The <!DOCTYPE> tag does not have an end tag.

	Tip: The <!DOCTYPE> declaration is NOT case sensitive.

	Tip: Use W3C's Validator to check that you have written a valid HTML / XHTML document!
	Common DOCTYPE Declarations
	HTML 5
	<!DOCTYPE html>
	HTML 4.01 Strict

	This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed.
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	HTML 4.01 Transitional

	This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed.
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	HTML 4.01 Frameset

	This DTD is equal to HTML 4.01 Transitional, but allows the use of frameset content.
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
	XHTML 1.0 Strict

	This DTD contains all HTML elements and attributes, but does NOT INCLUDE presentational or deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
	XHTML 1.0 Transitional

	This DTD contains all HTML elements and attributes, INCLUDING presentational and deprecated elements (like font). Framesets are not allowed. The markup must also be written as well-formed XML.
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	XHTML 1.0 Frameset

	This DTD is equal to XHTML 1.0 Transitional, but allows the use of frameset content.
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
	XHTML 1.1

	This DTD is equal to XHTML 1.0 Strict, but allows you to add modules (for example to provide ruby support for East-Asian languages).
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">


	-----------------------------------------------------------------------------------------------------------------------------

	HTML Elements and Valid DOCTYPES

	http://www.w3schools.com/tags/ref_html_dtd.asp
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