listing of foo.xml
------------------

  <foos>
    <foo>
      <a>I pity the foo</a>
      <b>foo bar</b>
      <c>foo cough</c>
      <d>baz bar foo</d>
    </foo>
    <foo>
      <a>...
      <b>...
      ...
    </foo>
    ... 
    ...
  </foos>