HTML 4 basic tags:
The Transitional DTD includes presentation attributes and elements that W3C expects to move to a style sheet. Use this when you need to use HTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML>
<HEAD>
<META http-equiv="Content-Type"
content="text/html;
charset=utf-8">
<TITLE>Title goes here</TITLE>
</HEAD>
<BODY>
all text goes here
</BODY>
</HTML>
XHTML Transitional Basic Tags:
Use this DTD when you need to use XHTML's presentational features because your readers don't have browsers that support Cascading Style Sheets (CSS). Note that all tags must be in lowercase and all non enclosing tags (like <hr><br><img><link><meta>) must end with a space / for example: <hr />
<!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" xml:lang="en">
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=utf-8" />
<title>Title goes here</title>
</head>
<body>
all text goes here
</body>
</html>
XHTML Strict Basic Tags:
Use this DTD when you want clean markup, free of presentational clutter. Use this together with Cascading Style Sheets (CSS): Must have lowercase tags and non-enclosing tags ended with space / (like <hr />)
<!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" xml:lang="en">
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=utf-8" />
<title>Title goes here</title>
</head>
<body>
all text goes here
</body>
</html>