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="Audio-input-microphone.svg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="601" ns="6" title="File:2008-2010 membership distribution.jpg" />
      <page pageid="209" ns="6" title="File:2009 member survey summary.png" />
      <page pageid="348" ns="6" title="File:2009 wmau membership distribution.jpg" />
      <page pageid="597" ns="6" title="File:2010 Gender distribution.jpg" />
      <page pageid="599" ns="6" title="File:2010 memberships.svg.png" />
      <page pageid="817" ns="6" title="File:2011-04-16-states.svg" />
      <page pageid="1495" ns="6" title="File:2011 Wikimedia Financial Report - Final.pdf" />
      <page pageid="1087" ns="6" title="File:AGM2011-Melbourne1.jpg" />
      <page pageid="1089" ns="6" title="File:AGM2011-Melbourne2.jpg" />
      <page pageid="64" ns="6" title="File:Arrow green.svg" />
    </pages>
  </query>
</api>