You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaifrom="Gnome globe current event.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="28" ns="6" title="File:Ambox content.png" />
      <page pageid="27" ns="6" title="File:Ambox deletion.png" />
      <page pageid="30" ns="6" title="File:Ambox move.png" />
      <page pageid="24" ns="6" title="File:Ambox notice.png">
        <duplicatefiles>
          <df name="Imbox_notice.png" user="Dick6809" timestamp="2011-04-15T00:48:58Z" />
        </duplicatefiles>
      </page>
      <page pageid="31" ns="6" title="File:Ambox protection.png" />
      <page pageid="26" ns="6" title="File:Ambox speedy deletion.png" />
      <page pageid="165" ns="6" title="File:Cmbox deletion.png" />
      <page pageid="29" ns="6" title="File:Edit-clear.png" />
      <page pageid="41" ns="6" title="File:Edit-copy green.png" />
      <page pageid="25" ns="6" title="File:Emblem-question-yellow.png" />
    </pages>
  </query>
</api>