What does XML look like?

This is a simple standalone XML file

<!-- Calendar Markup Language 1.0 -->
<CML>
  <WEEK START="1998-11-15">
    <DAY NAME="Monday">Go to the dentist</DAY>
    <DAY NAME="Thursday">Technical Conference!</DAY>
    <DAY NAME="Friday">Concert at the A.B.</DAY>
  </WEEK>
  <WEEK START="1998-11-22">
    <DAY NAME="Monday">Go back to the dentist</DAY>
    <DAY NAME="Tuesday" ALERT="red">
      Mother-in-law's birthday</DAY>
    <DAY NAME="Thursday" SPAN="4">
      Off to Paris for a long weekend</DAY>
  </WEEK>
</CML>