HTML Document Framework
Here are some useful frameworks for building new pages:
HTML 4.01 Transitional Framework
These headers are fine for most pages--sometimes XHTML is overkill.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>INSERT TITLE HERE</title>
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
<meta name="keywords" content="INSERT KEYWORDS HERE">
<meta name="description" content="INSERT DESCRIPTION HERE">
<link href="/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
</body>
</html>
<html>
<head>
<title>INSERT TITLE HERE</title>
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
<meta name="keywords" content="INSERT KEYWORDS HERE">
<meta name="description" content="INSERT DESCRIPTION HERE">
<link href="/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
</body>
</html>
XHTML 1.0 Strict Framework
If your document has to behave under all circumstances, use these headers and take care to close all your tags while writing your code!
<!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" lang="en" xml:lang="en">
<head>
<title>INSERT TITLE HERE</title>
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1" />
<meta name="keywords" content="INSERT KEYWORDS HERE" />
<meta name="description" content="INSERT DESCRIPTION HERE" />
<link href="/styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
</body>
</html>
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>INSERT TITLE HERE</title>
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1" />
<meta name="keywords" content="INSERT KEYWORDS HERE" />
<meta name="description" content="INSERT DESCRIPTION HERE" />
<link href="/styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
</body>
</html>