Example code of HTML5 doctype declaration
<!doctype html> <html> <head> <meta charset="utf-8"> <title>HTML5 Document</title> </head> <body> Content goes here... </body> </html>
Other common types of doctype declarations
HTML 4.01 Strict
HTML 4.01 Transitional
HTML 4.01 Frameset
XHTML 1.0 Strict
XHTML 1.0 Transitional
XHTML 1.0 Frameset
XHTML 1.1
1) HTML 4.01 Strict
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>HTML 4.01 Strict - doctype declaration</title> </head> <body> Content goes here.... </body> </html>
2) HTML 4.01 Transitional<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>HTML 4.01 Transitional - doctype declaration</title> </head><body> Content goes here... </body> </html>
3) HTML 4.01 Frameset
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>HTML 4.01 Frameset - doctype declaration</title> </head><body> Content goes here... </body> </html>
4) XHTML 1.0 Strict
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>XHTML 1.0 Strict - doctype declaration</title> </head><body> Content goes here.... </body> </html>
5) XHTML 1.0 Transitional
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>XHTML 1.0 Transitional - doctype declaration</title> </head><body> Content goes here... </body> </html>
http://codingcyber.com/html5-doctype-declaration-3067/