Sample XML document

Consider the following XML document, which has three address blocks. The final address block does not have a <city> element.

<?xml version="1.0"?>
<customers>
   <customer id="55000">
      <name>Charter Group</name>
      <address>
         <street>100 Main</street>
         <city>Framingham</city>
         <state>MA</state>
         <zip>01701</zip>
      </address>
      <address>
         <street>720 Prospect</street>
         <city>Framingham</city>
         <state>MA</state>
         <zip>01701</zip>
      </address>
      <address>
         <street>120 Ridge</street>
         <state>MA</state>
         <zip>01760</zip>
      </address>
   </customer>
</customers>