html/isindex/xhtml-1.xhtml

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
  <head>
    <title>&lt;isindex/> in XHTML</title>
  </head>
  <body>
    <isindex/>
    <pre id="source">
      <button onclick="
         var source = document.getElementById ('source');
          source.textContent = document.body.innerHTML;
      ">Show source</button>
    </pre>
  </body>
</html>
1	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
2	<head>
3	<title><isindex/> in XHTML</title>
4	</head>
5	<body>
6	<isindex/>
7	<pre id="source">
8	<button onclick="
9	var source = document.getElementById ('source');
10	source.textContent = document.body.innerHTML;
11	">Show source</button>
12	</pre>
13	</body>
14	</html>