
<?xml version="1.0" encoding="iso-8859-1"?>
<html xmlns="http://www.w3.org/TR/xhtml1" >
<head>
   <title> Title of XHTML Document </title>
</head><body>
<div class="myDiv">
    <h1> Heading of Page </h1>
     <mathml xmlns="http://www.w3.org/TR/mathml">
           ... MathML markup ... 
     </mathml>
     <p> more html stuff goes here </p>
    <smil xmlns="http://www.w3.org/TR/smil1">
           ... SMIL markup ...
     </smil>
     <p> This is <em>fun</em>, isn't it.
</div> 
</body></html>
