<?xml version="1.0"?>
<?oxygen SCHSchema="check-cardinality.sch" type="xml"?>
<Document xmlns="http://www.example.org"
          classification="secret">
    <Para classification="unclassified">
          One if by land, two if by sea;
    </Para>
    <Para classification="confidential">
          And I on the opposite shore will be,
          Ready to ride and spread the alarm
    </Para>
    <Para classification="unclassified">
          Ready to ride and spread the alarm
          Through every Middlesex, village and farm,
    </Para>
    <Para classification="secret">
          For the country folk to be up and to arm.
    </Para>
</Document>