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>
    <allimages>
      <img name="BALR.png" timestamp="2010-08-31T10:43:44Z" url="https://wiki.syn2cat.lu/w/images/f/f5/BALR.png" descriptionurl="https://wiki.syn2cat.lu/wiki/File:BALR.png" ns="6" title="File:BALR.png" />
      <img name="BALR_HS.jpg" timestamp="2010-09-16T07:41:13Z" url="https://wiki.syn2cat.lu/w/images/6/67/BALR_HS.jpg" descriptionurl="https://wiki.syn2cat.lu/wiki/File:BALR_HS.jpg" ns="6" title="File:BALR HS.jpg" />
      <img name="BOINC_Logo.png" timestamp="2011-06-15T13:05:52Z" url="https://wiki.syn2cat.lu/w/images/d/d1/BOINC_Logo.png" descriptionurl="https://wiki.syn2cat.lu/wiki/File:BOINC_Logo.png" ns="6" title="File:BOINC Logo.png" />
      <img name="B_festival_04.jpg" timestamp="2010-08-31T18:01:29Z" url="https://wiki.syn2cat.lu/w/images/a/a1/B_festival_04.jpg" descriptionurl="https://wiki.syn2cat.lu/wiki/File:B_festival_04.jpg" ns="6" title="File:B festival 04.jpg" />
      <img name="Banner.png" timestamp="2010-05-04T13:14:07Z" url="https://wiki.syn2cat.lu/w/images/8/87/Banner.png" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Banner.png" ns="6" title="File:Banner.png" />
      <img name="Banner_80.png" timestamp="2010-05-04T13:48:31Z" url="https://wiki.syn2cat.lu/w/images/5/51/Banner_80.png" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Banner_80.png" ns="6" title="File:Banner 80.png" />
      <img name="Bannertry1.jpg" timestamp="2009-02-09T18:13:24Z" url="https://wiki.syn2cat.lu/w/images/5/55/Bannertry1.jpg" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Bannertry1.jpg" ns="6" title="File:Bannertry1.jpg" />
      <img name="Bannertry2.jpg" timestamp="2009-02-09T18:48:41Z" url="https://wiki.syn2cat.lu/w/images/6/6e/Bannertry2.jpg" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Bannertry2.jpg" ns="6" title="File:Bannertry2.jpg" />
      <img name="Bannertry4.jpg" timestamp="2009-02-09T19:00:34Z" url="https://wiki.syn2cat.lu/w/images/c/c4/Bannertry4.jpg" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Bannertry4.jpg" ns="6" title="File:Bannertry4.jpg" />
      <img name="Barcode_600.png" timestamp="2009-09-13T13:09:35Z" url="https://wiki.syn2cat.lu/w/images/0/0b/Barcode_600.png" descriptionurl="https://wiki.syn2cat.lu/wiki/File:Barcode_600.png" ns="6" title="File:Barcode 600.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aifrom="Barlow logo.png" />
  </query-continue>
</api>