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="2009 0011-2009-hall-lg-001.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2" ns="6" title="File:2009 0001-2009-grt-lg-001.jpg" />
      <page pageid="3" ns="6" title="File:2009 0002-2009-grt-lg-002.jpg" />
      <page pageid="4" ns="6" title="File:2009 0003-2009-grt-lg-003.jpg" />
      <page pageid="5" ns="6" title="File:2009 0004-2009-grt-lg-004.jpg" />
      <page pageid="6" ns="6" title="File:2009 0005-2009-grt-lg-005.jpg" />
      <page pageid="7" ns="6" title="File:2009 0006-2009-grt-lg-006.jpg" />
      <page pageid="8" ns="6" title="File:2009 0007-2009-grt-lg-007.jpg" />
      <page pageid="9" ns="6" title="File:2009 0008-2009-grt-lg-008.jpg" />
      <page pageid="10" ns="6" title="File:2009 0009-2009-grt-lg-009.jpg" />
      <page pageid="11" ns="6" title="File:2009 0010-2009-grt-lg-010.jpg" />
    </pages>
  </query>
</api>