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>
    <allfileusages gafcontinue="Kansas_Interrogatories_personal_injury.doc" />
  </query-continue>
  <query>
    <pages>
      <page ns="6" title="File:Bill of Sale.doc" missing="" />
      <page ns="6" title="File:Confidentiality NDA.doc" missing="" />
      <page ns="6" title="File:Confidentiality agreement.doc" missing="" />
      <page ns="6" title="File:Confidentiality and nondisclosure agreement with non-compete and non-solicitation terms.doc" missing="" />
      <page ns="6" title="File:Example.jpg" missing="" />
      <page ns="6" title="File:Example.pdf" missing="" />
      <page ns="6" title="File:HOA Articles of Incorporation.doc" missing="" />
      <page pageid="126" ns="6" title="File:Bequest Language.pdf" />
      <page pageid="173" ns="6" title="File:Bill of Sale and Assignment and Assumption Agreement.doc" />
      <page pageid="174" ns="6" title="File:Ip confidentiality agt non-solicit.doc" />
    </pages>
  </query>
</api>