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="CM_Exams_and_Solutions_(D&#039;Hoker).pdf" timestamp="2014-10-04T01:18:35Z" url="https://physwiki.com/w/images/8/87/CM_Exams_and_Solutions_%28D%27Hoker%29.pdf" descriptionurl="https://physwiki.com/w/index.php/File:CM_Exams_and_Solutions_(D%27Hoker).pdf" ns="6" title="File:CM Exams and Solutions (D&#039;Hoker).pdf" />
      <img name="CvCp.pdf" timestamp="2014-05-05T19:11:58Z" url="https://physwiki.com/w/images/e/ee/CvCp.pdf" descriptionurl="https://physwiki.com/w/index.php/File:CvCp.pdf" ns="6" title="File:CvCp.pdf" />
      <img name="Day1_comp_solutions_Aug1.pdf" timestamp="2016-09-06T01:40:33Z" url="https://physwiki.com/w/images/0/03/Day1_comp_solutions_Aug1.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Day1_comp_solutions_Aug1.pdf" ns="6" title="File:Day1 comp solutions Aug1.pdf" />
      <img name="Day1_practice_comp_Aug1.pdf" timestamp="2016-09-06T01:34:34Z" url="https://physwiki.com/w/images/a/a4/Day1_practice_comp_Aug1.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Day1_practice_comp_Aug1.pdf" ns="6" title="File:Day1 practice comp Aug1.pdf" />
      <img name="Day2_comp_solutions_Aug2.pdf" timestamp="2016-09-06T01:41:56Z" url="https://physwiki.com/w/images/4/48/Day2_comp_solutions_Aug2.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Day2_comp_solutions_Aug2.pdf" ns="6" title="File:Day2 comp solutions Aug2.pdf" />
      <img name="Disc_1A_Week2_Solutions.pdf" timestamp="2016-10-25T05:58:56Z" url="https://physwiki.com/w/images/9/95/Disc_1A_Week2_Solutions.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Disc_1A_Week2_Solutions.pdf" ns="6" title="File:Disc 1A Week2 Solutions.pdf" />
      <img name="Disc_1A_Week_2_Solutions.pdf" timestamp="2016-09-05T05:24:40Z" url="https://physwiki.com/w/images/0/01/Disc_1A_Week_2_Solutions.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Disc_1A_Week_2_Solutions.pdf" ns="6" title="File:Disc 1A Week 2 Solutions.pdf" />
      <img name="Disc_1A_Week_3_Solutions.pdf" timestamp="2016-09-05T06:11:28Z" url="https://physwiki.com/w/images/d/d1/Disc_1A_Week_3_Solutions.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Disc_1A_Week_3_Solutions.pdf" ns="6" title="File:Disc 1A Week 3 Solutions.pdf" />
      <img name="Disc_1A_Week_4_Solutions.pdf" timestamp="2016-09-05T06:21:57Z" url="https://physwiki.com/w/images/b/b7/Disc_1A_Week_4_Solutions.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Disc_1A_Week_4_Solutions.pdf" ns="6" title="File:Disc 1A Week 4 Solutions.pdf" />
      <img name="Disc_4_Solutions.pdf" timestamp="2016-09-05T06:24:45Z" url="https://physwiki.com/w/images/f/f0/Disc_4_Solutions.pdf" descriptionurl="https://physwiki.com/w/index.php/File:Disc_4_Solutions.pdf" ns="6" title="File:Disc 4 Solutions.pdf" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Disc_5_Sol.pdf" />
  </query-continue>
</api>