Element Declaration

   <!ELEMENT ElementName ContentSpec>


   <!ELEMENT exam (student,(qapair)*)>


• The exam element contains student element followed by qapair elements
• The * indicates that it can have zero or more of these
• We may have a student who answers No questions!
• So far we have said this is legal:

  <exam>
    <student>
    </student>
    <qapair>
    </qapair>
    <qapair>
    </qapair>
  </exam>