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>
    <allimages>
      <img name="Bank_reciepts.jpg" timestamp="2018-02-04T13:08:17Z" url="http://www.hillvanden.com/images/1/1b/Bank_reciepts.jpg" descriptionurl="http://www.hillvanden.com/File:Bank_reciepts.jpg" ns="6" title="File:Bank reciepts.jpg" />
      <img name="Ben&amp;Marg_Wedding_photo.jpg" timestamp="2018-05-18T18:41:37Z" url="http://www.hillvanden.com/images/9/9e/Ben%26Marg_Wedding_photo.jpg" descriptionurl="http://www.hillvanden.com/File:Ben%26Marg_Wedding_photo.jpg" ns="6" title="File:Ben&amp;Marg Wedding photo.jpg" />
      <img name="Ben.jpg" timestamp="2018-01-18T19:30:59Z" url="http://www.hillvanden.com/images/0/0a/Ben.jpg" descriptionurl="http://www.hillvanden.com/File:Ben.jpg" ns="6" title="File:Ben.jpg" />
      <img name="BenandMarg1.jpg" timestamp="2018-01-18T19:31:29Z" url="http://www.hillvanden.com/images/5/56/BenandMarg1.jpg" descriptionurl="http://www.hillvanden.com/File:BenandMarg1.jpg" ns="6" title="File:BenandMarg1.jpg" />
      <img name="Birth_Certificate.jpg" timestamp="2013-08-27T00:31:00Z" url="http://www.hillvanden.com/images/6/63/Birth_Certificate.jpg" descriptionurl="http://www.hillvanden.com/File:Birth_Certificate.jpg" ns="6" title="File:Birth Certificate.jpg" />
      <img name="BudaiFamily1.jpg" timestamp="2018-01-18T19:31:45Z" url="http://www.hillvanden.com/images/3/32/BudaiFamily1.jpg" descriptionurl="http://www.hillvanden.com/File:BudaiFamily1.jpg" ns="6" title="File:BudaiFamily1.jpg" />
      <img name="Budai_girls.jpg" timestamp="2018-01-06T15:13:18Z" url="http://www.hillvanden.com/images/8/8c/Budai_girls.jpg" descriptionurl="http://www.hillvanden.com/File:Budai_girls.jpg" ns="6" title="File:Budai girls.jpg" />
      <img name="CCC_repayment.jpg" timestamp="2013-08-27T00:30:59Z" url="http://www.hillvanden.com/images/1/11/CCC_repayment.jpg" descriptionurl="http://www.hillvanden.com/File:CCC_repayment.jpg" ns="6" title="File:CCC repayment.jpg" />
      <img name="Canadian_Citizenship_back.jpg" timestamp="2018-02-04T13:08:03Z" url="http://www.hillvanden.com/images/9/97/Canadian_Citizenship_back.jpg" descriptionurl="http://www.hillvanden.com/File:Canadian_Citizenship_back.jpg" ns="6" title="File:Canadian Citizenship back.jpg" />
      <img name="Canadian_Citizenship_front.jpg" timestamp="2018-02-04T13:07:50Z" url="http://www.hillvanden.com/images/5/53/Canadian_Citizenship_front.jpg" descriptionurl="http://www.hillvanden.com/File:Canadian_Citizenship_front.jpg" ns="6" title="File:Canadian Citizenship front.jpg" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Census_1921_Budai_Family1).jpg" />
  </query-continue>
</api>