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>
    <allredirects garcontinue="NB_SC|156" />
  </query-continue>
  <query>
    <pages>
      <page pageid="11" ns="0" title="Project Links" />
      <page pageid="146" ns="0" title="Mandatory access control" />
      <page pageid="147" ns="0" title="Multi-Level Security" />
      <page pageid="148" ns="0" title="Multi-Category Security" />
      <page pageid="149" ns="0" title="Multi-level security" />
      <page pageid="152" ns="0" title="Refpolicy" />
      <page pageid="153" ns="0" title="Security context" />
      <page pageid="155" ns="0" title="Reference Policy" />
      <page pageid="161" ns="0" title="Mandatory Access Control" />
      <page pageid="162" ns="0" title="Mac" />
    </pages>
  </query>
</api>