<root>
 <head xmlns="http://www.w3.org/1999/xhtml">
  <link rel="author" title="L. David Baron" href="https://dbaron.org/"/>
  <link rel="author" title="Mozilla" href="http://mozilla.org/"/>
  <title>CSS Namespaces Test Suite reference</title>
  <style>
   t { background:lime }
  </style>
 </head>
 <t>This sentence should have a green background.</t>
</root>
