You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaicontinue="Anbtut01_flame1_movie_maker.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="207" ns="6" title="File:64 bit Java installation.png" />
      <page pageid="88" ns="6" title="File:Alternative-ways-of-starting-jwildfire.jpg" />
      <page pageid="108" ns="6" title="File:Anbtut01 create motion curve.jpg" />
      <page pageid="109" ns="6" title="File:Anbtut01 edit motion curve.jpg" />
      <page pageid="110" ns="6" title="File:Anbtut01 edit motion curve2.jpg" />
      <page pageid="106" ns="6" title="File:Anbtut01 enable motion curves.jpg" />
      <page pageid="72" ns="6" title="File:Anbtut01 example1.jpg" />
      <page pageid="41" ns="6" title="File:Anbtut01 flame.jpg" />
      <page pageid="70" ns="6" title="File:Anbtut01 flame1 create size profile.jpg" />
      <page pageid="77" ns="6" title="File:Anbtut01 flame1 editor.jpg" />
    </pages>
  </query>
</api>