<schema>
  <sectiontype name="loghandler">
    <key name="constructor" datatype="constructor" required="yes"/>
    <key name="formatter" datatype="constructor"
         default="logging.Formatter()"/>
  </sectiontype>

  <sectiontype name="logger">
     <key name="level" datatype="integer" default="info"/>
     <multisection type="loghandler" attribute="handlers" name="*"/>
  </sectiontype>
</schema>
