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="ISCOM HT803G-W.JPG" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3" ns="6" title="Súbor:20px-Yes check.png" />
      <page pageid="10" ns="6" title="Súbor:Antena.jpeg" />
      <page pageid="69" ns="6" title="Súbor:Apc simplex patch cord.jpg" />
      <page pageid="79" ns="6" title="Súbor:Arris-vip1113-zadni-panel.jpg" />
      <page pageid="78" ns="6" title="Súbor:Arris 1113 w remote.jpg" />
      <page pageid="54" ns="6" title="Súbor:Arris VIP1113.jpg" />
      <page pageid="53" ns="6" title="Súbor:Arris VIP1113.png" />
      <page pageid="82" ns="6" title="Súbor:False.png" />
      <page pageid="70" ns="6" title="Súbor:Fttx outdoor box.jpg" />
      <page pageid="71" ns="6" title="Súbor:Giga-utp-patch-cord.jpg" />
    </pages>
  </query>
</api>