1  <?xml version="1.0"?>
2  <chapter>
3    <p>a simple test</p>
4    <p>multiple tests</p>
5    <p>a diff<em>i</em>cult one</p>
6    <p><p>a span</p>n<p>ing one</p></p>
7    <p><p>and an unbal</p><empty/>anced test</p>
8    <p>for empty string <seq>123</seq></p>
9  </chapter>