<book xmlns='urn:loc.gov:books'
xmlns:isbn='urn:ISBN:0-395-36341-6'
xml:lang="en">
<title>Cheaper by the Dozen</title>
<isbn:number>1568491379</isbn:number>
<notes>
<p xmlns='http://www.w3.org/1999/xhtml'>
This is also available <a href=
"http://www.w3.org/">online</a>.
</p>
</notes>
</book>