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 aicontinue="Back_to_Hack.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="B-Finale_2011_IMPR.jpg" timestamp="2011-06-27T17:07:48Z" url="https://wiki.attraktor.org/images/5/5f/B-Finale_2011_IMPR.jpg" descriptionurl="https://wiki.attraktor.org/index.php/File:B-Finale_2011_IMPR.jpg" ns="6" title="File:B-Finale 2011 IMPR.jpg" />
      <img name="BCBoesch-IDS-Parametrisierung.pdf" timestamp="2012-06-05T21:52:08Z" url="https://wiki.attraktor.org/images/c/c4/BCBoesch-IDS-Parametrisierung.pdf" descriptionurl="https://wiki.attraktor.org/index.php/File:BCBoesch-IDS-Parametrisierung.pdf" ns="6" title="File:BCBoesch-IDS-Parametrisierung.pdf" />
      <img name="BRM_90130_Colourful_control_pannel_manual.pdf" timestamp="2016-05-18T15:55:38Z" url="https://wiki.attraktor.org/images/4/41/BRM_90130_Colourful_control_pannel_manual.pdf" descriptionurl="https://wiki.attraktor.org/index.php/File:BRM_90130_Colourful_control_pannel_manual.pdf" ns="6" title="File:BRM 90130 Colourful control pannel manual.pdf" />
      <img name="BRM_90130_Cutting_parameter.pdf" timestamp="2016-05-18T15:50:05Z" url="https://wiki.attraktor.org/images/2/2a/BRM_90130_Cutting_parameter.pdf" descriptionurl="https://wiki.attraktor.org/index.php/File:BRM_90130_Cutting_parameter.pdf" ns="6" title="File:BRM 90130 Cutting parameter.pdf" />
      <img name="BRM_90130_Gebrauchsanleitung.pdf" timestamp="2016-05-18T06:11:40Z" url="https://wiki.attraktor.org/images/5/59/BRM_90130_Gebrauchsanleitung.pdf" descriptionurl="https://wiki.attraktor.org/index.php/File:BRM_90130_Gebrauchsanleitung.pdf" ns="6" title="File:BRM 90130 Gebrauchsanleitung.pdf" />
      <img name="BRM_90130_Maintaince_manual.pdf" timestamp="2016-05-18T15:44:48Z" url="https://wiki.attraktor.org/images/4/46/BRM_90130_Maintaince_manual.pdf" descriptionurl="https://wiki.attraktor.org/index.php/File:BRM_90130_Maintaince_manual.pdf" ns="6" title="File:BRM 90130 Maintaince manual.pdf" />
      <img name="BTListe_wiki.jpg" timestamp="2014-03-30T17:32:06Z" url="https://wiki.attraktor.org/images/6/63/BTListe_wiki.jpg" descriptionurl="https://wiki.attraktor.org/index.php/File:BTListe_wiki.jpg" ns="6" title="File:BTListe wiki.jpg" />
      <img name="Ba.png" timestamp="2012-11-20T05:46:26Z" url="https://wiki.attraktor.org/images/b/b5/Ba.png" descriptionurl="https://wiki.attraktor.org/index.php/File:Ba.png" ns="6" title="File:Ba.png" />
      <img name="Back2hack_black.png" timestamp="2012-10-17T19:46:32Z" url="https://wiki.attraktor.org/images/b/b0/Back2hack_black.png" descriptionurl="https://wiki.attraktor.org/index.php/File:Back2hack_black.png" ns="6" title="File:Back2hack black.png" />
      <img name="Back2hack_white.png" timestamp="2013-01-18T03:29:37Z" url="https://wiki.attraktor.org/images/5/5e/Back2hack_white.png" descriptionurl="https://wiki.attraktor.org/index.php/File:Back2hack_white.png" ns="6" title="File:Back2hack white.png" />
    </allimages>
  </query>
</api>