Basic Structure of an xhtml page
<!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" lang="en">
<head>
<title>I'm The Title</title>
</head>
<body>
I'm The Body.........
</body>
</html>
<!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" lang="en">
<head>
<title>I'm The Title</title>
</head>
<body>
I'm The Body.........
</body>
</html>