Doctype


                                <!DOCTYPE top-element availability "registration//organization//type label//definition language" "uniform-resource-locator">

Name:	Default:	Description:
top element	html	specifies the top-level element
availability	PUBLIC	specifies whether the formal public identifier (FPI) is a publicly accessible object or a system resource
		PUBLIC specifies a publicly accessible object
		SYSTEM specifies a system resource, such as a local file or URL
registration	+	specifies whether the organization is registered by the International Organization for Standardization (ISO)
		+ specifies registered
		- specifies not registered
organization		specifies the OwnerID, a unique label indicating the name of the organization responsible for creation and maintenance of the DTD
type	DTD	specifies the public text class, the type of object being referenced
label	HTML	specifies the public text description, a unique descriptive name for the public text being referenced
definition		specifies the document type definition (DTD)
		Strict specifies non-depreciated and non-frame elements and attributes
		Transitional specifies depreciated and non-frame elements and attributes
		Frameset specifies depreciated and frame elements and attributes
language	EN	specifies the public text language, the natural language encoding system used in the creation of the referenced object
uniform resource locator (URL)		specifies the location of the referenced object

Doctype must occur at the start of the HTML document.

HTML 4
HTML 4.01
XHTML 1
XHTML 1.1
XHTML Basic 1.1
HTML5
Example
References


                                <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN">

Strict:


                                <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">


                                <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">

Strict:


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

Transitional:


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

Frameset:


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

Strict:


                                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

Transitional:


                                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Frameset:


                                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">


                                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">


                                <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">


                                <!DOCTYPE html>

Microsoft Doctype

W3C HTML 4.01 Specification

W3C HTML5

W3C HTML: The Markup Language

HTML

HTML 4

HTML 4.01

XHTML 1

XHTML 1.1

XHTML Basic 1.1

HTML5

Example

References