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="BLE_shield3.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="B.png" timestamp="2015-08-24T03:30:13Z" url="https://wiki.iteadstudio.com/images/5/57/B.png" descriptionurl="https://wiki.iteadstudio.com/File:B.png" ns="6" title="File:B.png" />
      <img name="BCTC-FY180100467-1E-62311-Report_Sonoff-Basic-RF.pdf" timestamp="2018-02-09T02:03:39Z" url="https://wiki.iteadstudio.com/images/c/c8/BCTC-FY180100467-1E-62311-Report_Sonoff-Basic-RF.pdf" descriptionurl="https://wiki.iteadstudio.com/File:BCTC-FY180100467-1E-62311-Report_Sonoff-Basic-RF.pdf" ns="6" title="File:BCTC-FY180100467-1E-62311-Report Sonoff-Basic-RF.pdf" />
      <img name="BCTC-FY180100467-2E-EMC-Report_Sonoff-Basic-RF.pdf" timestamp="2018-02-09T02:03:57Z" url="https://wiki.iteadstudio.com/images/d/d9/BCTC-FY180100467-2E-EMC-Report_Sonoff-Basic-RF.pdf" descriptionurl="https://wiki.iteadstudio.com/File:BCTC-FY180100467-2E-EMC-Report_Sonoff-Basic-RF.pdf" ns="6" title="File:BCTC-FY180100467-2E-EMC-Report Sonoff-Basic-RF.pdf" />
      <img name="BCTC-FY180100467-3E-WIFI-Report_Sonoff-Basic-RF.pdf" timestamp="2018-02-09T02:04:20Z" url="https://wiki.iteadstudio.com/images/2/2b/BCTC-FY180100467-3E-WIFI-Report_Sonoff-Basic-RF.pdf" descriptionurl="https://wiki.iteadstudio.com/File:BCTC-FY180100467-3E-WIFI-Report_Sonoff-Basic-RF.pdf" ns="6" title="File:BCTC-FY180100467-3E-WIFI-Report Sonoff-Basic-RF.pdf" />
      <img name="BCTC-FY180100467C_CE_RED_Sonoff-Basic-RF.pdf" timestamp="2018-02-09T02:04:24Z" url="https://wiki.iteadstudio.com/images/2/26/BCTC-FY180100467C_CE_RED_Sonoff-Basic-RF.pdf" descriptionurl="https://wiki.iteadstudio.com/File:BCTC-FY180100467C_CE_RED_Sonoff-Basic-RF.pdf" ns="6" title="File:BCTC-FY180100467C CE RED Sonoff-Basic-RF.pdf" />
      <img name="BL18_ECG_Maven-01.jpg" timestamp="2016-10-09T07:48:53Z" url="https://wiki.iteadstudio.com/images/d/d8/BL18_ECG_Maven-01.jpg" descriptionurl="https://wiki.iteadstudio.com/File:BL18_ECG_Maven-01.jpg" ns="6" title="File:BL18 ECG Maven-01.jpg" />
      <img name="BL18_ECG_Maven_hardware.jpg" timestamp="2016-10-09T07:14:22Z" url="https://wiki.iteadstudio.com/images/8/89/BL18_ECG_Maven_hardware.jpg" descriptionurl="https://wiki.iteadstudio.com/File:BL18_ECG_Maven_hardware.jpg" ns="6" title="File:BL18 ECG Maven hardware.jpg" />
      <img name="BLE_shield.jpg" timestamp="2014-05-26T08:04:38Z" url="https://wiki.iteadstudio.com/images/5/5a/BLE_shield.jpg" descriptionurl="https://wiki.iteadstudio.com/File:BLE_shield.jpg" ns="6" title="File:BLE shield.jpg" />
      <img name="BLE_shield1.jpg" timestamp="2014-05-26T08:13:20Z" url="https://wiki.iteadstudio.com/images/7/70/BLE_shield1.jpg" descriptionurl="https://wiki.iteadstudio.com/File:BLE_shield1.jpg" ns="6" title="File:BLE shield1.jpg" />
      <img name="BLE_shield2.jpg" timestamp="2014-05-26T08:14:47Z" url="https://wiki.iteadstudio.com/images/e/e5/BLE_shield2.jpg" descriptionurl="https://wiki.iteadstudio.com/File:BLE_shield2.jpg" ns="6" title="File:BLE shield2.jpg" />
    </allimages>
  </query>
</api>