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="102B0270_TV_Card_Hauppauge_WinTV_PVR-500_NTSCNTSC-J_23552_2205_8221090.JPG" />
  </query-continue>
  <query>
    <pages>
      <page pageid="970" ns="6" title="File:" />
      <page pageid="5081" ns="6" title="File:1.jpg" />
      <page pageid="2283" ns="6" title="File:100 7999.JPG" />
      <page pageid="6061" ns="6" title="File:101B8030-StarTech-svid2usb23.JPG" />
      <page pageid="6065" ns="6" title="File:101B8090-OupreeUVC2900.JPG" />
      <page pageid="6062" ns="6" title="File:101 7243-OupreeUVC2900-inside.JPG" />
      <page pageid="6064" ns="6" title="File:101 7260-Oupree-UVC2900-inside-back.JPG" />
      <page pageid="6057" ns="6" title="File:101 8020-IonVideo.JPG" />
      <page pageid="6055" ns="6" title="File:101 8021-IonVideo.JPG" />
      <page pageid="6058" ns="6" title="File:101 8022-StarTech.JPG" />
    </pages>
  </query>
</api>