The formatting of a nice message for this event hasn't been implemented yet, so 
I'll just put an XML dump of the event here.

<ns:documentTypeUpdated xmlns:ns="http://outerx.org/daisy/1.0";>
  <ns:oldDocumentType>
    <ns:documentType id="13" lastModified="2006-10-18T21:49:29.000Z" 
lastModifier="109" name="NewsEntry" deprecated="false" updateCount="2">
      <ns:labels/>
      <ns:descriptions/>
      <ns:partTypeUses>
        <ns:partTypeUse partTypeId="2" required="true"/>
      </ns:partTypeUses>
      <ns:fieldTypeUses>
        <ns:fieldTypeUse fieldTypeId="4" required="false"/>
      </ns:fieldTypeUses>
    </ns:documentType>
  </ns:oldDocumentType>
  <ns:newDocumentType>
    <ns:documentType id="13" lastModified="2006-10-31T14:20:49.822Z" 
lastModifier="247" name="NewsItem" deprecated="false" updateCount="3">
      <ns:labels/>
      <ns:descriptions/>
      <ns:partTypeUses>
        <ns:partTypeUse partTypeId="2" required="true"/>
      </ns:partTypeUses>
      <ns:fieldTypeUses>
        <ns:fieldTypeUse fieldTypeId="4" required="false"/>
      </ns:fieldTypeUses>
    </ns:documentType>
  </ns:newDocumentType>
</ns:documentTypeUpdated>