Using Multiple Namespaces

  <pap:exam
    xmlns:sr ="http://brnl.ac.uk/strcs"
      xmlns:csr="http://brnl.ac.uk/csrcns"
    xmlns:pap="http://brnl.ac.uk/marking"
    csr:paper="cs203">
    <sr:student>Fred Smith</sr:student>
    <pap:qapair number="3">
      <pap:question>Who is the last King of England?</pap:question>
      <pap:answer>George VI</pap:answer>
      ...
    </pap:quapair>
  </pap:exam>