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="Canon_FlexTT5.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="BasicWireless_E-TTL_II1.jpg" timestamp="2011-09-27T19:44:41Z" url="https://wiki.pocketwizard.com/images/f/f3/BasicWireless_E-TTL_II1.jpg" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:BasicWireless_E-TTL_II1.jpg" ns="6" title="File:BasicWireless E-TTL II1.jpg" />
      <img name="BasicWireless_E-TTL_II2.jpg" timestamp="2011-09-27T19:57:15Z" url="https://wiki.pocketwizard.com/images/7/77/BasicWireless_E-TTL_II2.jpg" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:BasicWireless_E-TTL_II2.jpg" ns="6" title="File:BasicWireless E-TTL II2.jpg" />
      <img name="BasicWireless_E-TTL_II3.jpg" timestamp="2011-09-27T20:54:52Z" url="https://wiki.pocketwizard.com/images/5/5e/BasicWireless_E-TTL_II3.jpg" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:BasicWireless_E-TTL_II3.jpg" ns="6" title="File:BasicWireless E-TTL II3.jpg" />
      <img name="Beta_Firmware_1.63.png" timestamp="2016-08-16T18:31:08Z" url="https://wiki.pocketwizard.com/images/b/b5/Beta_Firmware_1.63.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Beta_Firmware_1.63.png" ns="6" title="File:Beta Firmware 1.63.png" />
      <img name="Beta_Firmware_Selection_1.63.png" timestamp="2016-08-16T18:40:23Z" url="https://wiki.pocketwizard.com/images/9/93/Beta_Firmware_Selection_1.63.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Beta_Firmware_Selection_1.63.png" ns="6" title="File:Beta Firmware Selection 1.63.png" />
      <img name="Betascreenshot1.png" timestamp="2011-08-31T18:49:59Z" url="https://wiki.pocketwizard.com/images/9/99/Betascreenshot1.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Betascreenshot1.png" ns="6" title="File:Betascreenshot1.png" />
      <img name="Betascreenshot2.png" timestamp="2011-08-31T18:51:48Z" url="https://wiki.pocketwizard.com/images/a/ab/Betascreenshot2.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Betascreenshot2.png" ns="6" title="File:Betascreenshot2.png" />
      <img name="Bluearrow.png" timestamp="2011-09-13T20:23:32Z" url="https://wiki.pocketwizard.com/images/3/3b/Bluearrow.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Bluearrow.png" ns="6" title="File:Bluearrow.png" />
      <img name="Book_icoline.png" timestamp="2010-12-27T20:57:30Z" url="https://wiki.pocketwizard.com/images/8/8f/Book_icoline.png" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Book_icoline.png" ns="6" title="File:Book icoline.png" />
      <img name="Bubby.jpg" timestamp="2010-12-09T14:50:23Z" url="https://wiki.pocketwizard.com/images/5/5e/Bubby.jpg" descriptionurl="https://wiki.pocketwizard.com/index.php?title=File:Bubby.jpg" ns="6" title="File:Bubby.jpg" />
    </allimages>
  </query>
</api>