You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="Guide for Editors" />
          <pl ns="0" title="List of Topics" />
          <pl ns="0" title="Proposed Voting Rights Amendment" />
          <pl ns="0" title="The Future of Transportation" />
          <pl ns="0" title="U.S. Drug Policy" />
          <pl ns="0" title="UNICE global brain project" />
          <pl ns="0" title="Voting Rights in the U.S." />
        </links>
      </page>
    </pages>
  </query>
</api>