test_howto
SAX tests:

Sandman #62 found

Titles by Peter Milligan:
Shade, the Changing Man 7
DOM tests:

<?xml version="1.0"?>
<xbel>  
  <?processing instruction?>
  <desc>No description</desc>
  <folder>
    <title>XML bookmarks</title>
    <bookmark href='http://www.python.org/sigs/xml-sig/'>
      <title>SIG for XML Processing in Python</title>
    </bookmark>
  </folder>
</xbel>
 With whitespace removed:
<?xml version="1.0"?>
<xbel><?processing instruction?><desc>No description</desc><folder><title>XML bookmarks</title><bookmark href='http://www.python.org/sigs/xml-sig/'><title>SIG for XML Processing in Python</title></bookmark></folder></xbel>

xml.dom.builder tests
