2.2 XML Elements

• Tags on data elements, identifying their meaning
  <courses>
    <course>
       <number>670</number>
       <quarter>Spring</quarter>
       <days>TR</days>
    </course>
    <course>
       <number>680</number>
       <quarter>Autumn</quarter>
       <days/>
    </course>
  </courses>
• Start and end tags required: <tag>...</tag>
• Empty elements may use short cuts: <tag/>
• Proper nesting of tags
• Root element
• Names are case-sensitive