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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="Halle_Bemassung_OG.pdf" />
  </query-continue>
  <query>
    <allimages>
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      <img name="C-logo_claim_blue.png" timestamp="2006-06-28T15:21:08Z" url="http://wiki.wizards-of-os.org/images/c/c7/C-logo_claim_blue.png" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:C-logo_claim_blue.png" ns="6" title="File:C-logo claim blue.png" />
      <img name="C-logo_claim_white.png" timestamp="2006-06-28T15:22:20Z" url="http://wiki.wizards-of-os.org/images/9/97/C-logo_claim_white.png" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:C-logo_claim_white.png" ns="6" title="File:C-logo claim white.png" />
      <img name="Club_Bemassung.pdf" timestamp="2006-06-28T14:16:11Z" url="http://wiki.wizards-of-os.org/images/3/38/Club_Bemassung.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Club_Bemassung.pdf" ns="6" title="File:Club Bemassung.pdf" />
      <img name="Club_Reihe.pdf" timestamp="2006-06-28T14:23:43Z" url="http://wiki.wizards-of-os.org/images/d/d7/Club_Reihe.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Club_Reihe.pdf" ns="6" title="File:Club Reihe.pdf" />
      <img name="ColumbiaClub_Speks_deutsch.pdf" timestamp="2006-06-28T14:24:03Z" url="http://wiki.wizards-of-os.org/images/7/7a/ColumbiaClub_Speks_deutsch.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:ColumbiaClub_Speks_deutsch.pdf" ns="6" title="File:ColumbiaClub Speks deutsch.pdf" />
      <img name="Cven_01.jpg" timestamp="2006-08-10T10:54:11Z" url="http://wiki.wizards-of-os.org/images/0/0d/Cven_01.jpg" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Cven_01.jpg" ns="6" title="File:Cven 01.jpg" />
      <img name="Deutsche_Specs_2004.pdf" timestamp="2006-06-28T14:24:59Z" url="http://wiki.wizards-of-os.org/images/e/e3/Deutsche_Specs_2004.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Deutsche_Specs_2004.pdf" ns="6" title="File:Deutsche Specs 2004.pdf" />
      <img name="Grundriss_Rigging_EG_Ger.pdf" timestamp="2006-06-28T14:25:30Z" url="http://wiki.wizards-of-os.org/images/b/be/Grundriss_Rigging_EG_Ger.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Grundriss_Rigging_EG_Ger.pdf" ns="6" title="File:Grundriss Rigging EG Ger.pdf" />
      <img name="Halle_Bemassung_EG.pdf" timestamp="2006-06-28T14:25:43Z" url="http://wiki.wizards-of-os.org/images/1/13/Halle_Bemassung_EG.pdf" descriptionurl="http://wiki.wizards-of-os.org/index.php/File:Halle_Bemassung_EG.pdf" ns="6" title="File:Halle Bemassung EG.pdf" />
    </allimages>
  </query>
</api>