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="Arena 2-0 Extended Search.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="214" ns="6" title="File:AXL linkportal logo.png" />
      <page pageid="40" ns="6" title="File:Account summary panel.png" />
      <page pageid="119" ns="6" title="File:Admin pages 1.png" />
      <page pageid="121" ns="6" title="File:Admin pages display order.png" />
      <page pageid="120" ns="6" title="File:Admin pages permissions.png" />
      <page pageid="126" ns="6" title="File:Admin pages themes.png" />
      <page pageid="98" ns="6" title="File:Admin welcome menu.png" />
      <page pageid="99" ns="6" title="File:Admin welcome menu 2.png" />
      <page pageid="142" ns="6" title="File:Alert.png" />
      <page pageid="820" ns="6" title="File:Apache wicket logo.png" />
    </pages>
  </query>
</api>