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 gaicontinue="NonMotorized_HBW1.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="35" ns="6" title="File:BWI Accessibility.jpg" />
      <page pageid="36" ns="6" title="File:Case1 TOD.jpg" />
      <page pageid="37" ns="6" title="File:Case2 Amazon.jpg" />
      <page pageid="38" ns="6" title="File:Case3 CSX.jpg" />
      <page pageid="39" ns="6" title="File:Case4 ArundelMills.jpg" />
      <page pageid="40" ns="6" title="File:Case5 MultiModal.jpg" />
      <page pageid="42" ns="6" title="File:FAF Processing.jpg" />
      <page pageid="34" ns="6" title="File:Job Accessibility.jpg" />
      <page pageid="32" ns="6" title="File:MC Validation.jpg" />
      <page pageid="20" ns="6" title="File:MSTM Overview.jpg" />
    </pages>
  </query>
</api>