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="Kuu_smiling.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="Crows_on_power_line.jpg" timestamp="2007-07-08T21:39:13Z" url="http://haibaniki.rubychan.de/images/c/c4/Crows_on_power_line.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Crows_on_power_line.jpg" ns="6" title="File:Crows on power line.jpg" />
      <img name="Four-eyed_fangirl.jpg" timestamp="2006-08-31T23:52:38Z" url="http://haibaniki.rubychan.de/images/9/9a/Four-eyed_fangirl.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Four-eyed_fangirl.jpg" ns="6" title="File:Four-eyed fangirl.jpg" />
      <img name="GuriTownMap.jpg" timestamp="2007-03-07T22:47:43Z" url="http://haibaniki.rubychan.de/images/b/bc/GuriTownMap.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:GuriTownMap.jpg" ns="6" title="File:GuriTownMap.jpg" />
      <img name="HRTrain.jpg" timestamp="2018-05-23T23:53:03Z" url="http://haibaniki.rubychan.de/images/8/87/HRTrain.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:HRTrain.jpg" ns="6" title="File:HRTrain.jpg" />
      <img name="Haibaniki_Logo.png" timestamp="2006-08-30T19:40:07Z" url="http://haibaniki.rubychan.de/images/5/50/Haibaniki_Logo.png" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Haibaniki_Logo.png" ns="6" title="File:Haibaniki Logo.png" />
      <img name="Hana_complaining.jpg" timestamp="2006-09-10T14:08:16Z" url="http://haibaniki.rubychan.de/images/0/0d/Hana_complaining.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Hana_complaining.jpg" ns="6" title="File:Hana complaining.jpg" />
      <img name="Hikari_with_glowing_halo.jpg" timestamp="2006-08-24T19:16:07Z" url="http://haibaniki.rubychan.de/images/b/bf/Hikari_with_glowing_halo.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Hikari_with_glowing_halo.jpg" ns="6" title="File:Hikari with glowing halo.jpg" />
      <img name="Kana_with_machinery.jpg" timestamp="2007-07-08T21:22:56Z" url="http://haibaniki.rubychan.de/images/2/2a/Kana_with_machinery.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Kana_with_machinery.jpg" ns="6" title="File:Kana with machinery.jpg" />
      <img name="Kana_without_halo.jpg" timestamp="2006-09-01T00:09:12Z" url="http://haibaniki.rubychan.de/images/d/d1/Kana_without_halo.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Kana_without_halo.jpg" ns="6" title="File:Kana without halo.jpg" />
      <img name="Kuramori_Young_Reki_Washi.jpg" timestamp="2006-09-01T00:46:20Z" url="http://haibaniki.rubychan.de/images/2/21/Kuramori_Young_Reki_Washi.jpg" descriptionurl="http://haibaniki.rubychan.de/wiki/File:Kuramori_Young_Reki_Washi.jpg" ns="6" title="File:Kuramori Young Reki Washi.jpg" />
    </allimages>
  </query>
</api>