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="0012c-rotolino-B-Scan10044.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2085" ns="6" title="File:0001a-STAMPA-IMG 20160209 0002.jpg" />
      <page pageid="2086" ns="6" title="File:0001f-5-neg-Scan10067.jpg" />
      <page pageid="2087" ns="6" title="File:0001h-5-neg-Scan10070.jpg" />
      <page pageid="2088" ns="6" title="File:0001i-5-neg-Scan10071.jpg" />
      <page pageid="2090" ns="6" title="File:0002b1-5-neg-Scan10069.jpg" />
      <page pageid="2091" ns="6" title="File:0003c-5-neg-Scan10073.jpg" />
      <page pageid="2092" ns="6" title="File:0003f-STAMPA-Senza-titolo-2.jpg" />
      <page pageid="2093" ns="6" title="File:0007a-Scan10039.jpg" />
      <page pageid="2094" ns="6" title="File:0007b-Scan10038.jpg" />
      <page pageid="2095" ns="6" title="File:0010-Scan10004.jpg" />
    </pages>
  </query>
</api>