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">
        <revisions>
          <rev user="Entropy" timestamp="2016-03-30T22:42:49Z" comment="Updated/removed old links" />
          <rev user="Entropy" timestamp="2013-08-01T18:32:17Z" comment="Added Crusader links to main page." />
          <rev user="Entropy" timestamp="2013-02-16T23:53:47Z" />
          <rev user="Entropy" timestamp="2011-04-04T08:50:15Z" comment="added Trickster" />
          <rev user="Icy" timestamp="2009-06-19T23:19:56Z" comment="Added new link" />
        </revisions>
      </page>
    </pages>
  </query>
  <query-continue>
    <revisions rvstartid="22599" />
  </query-continue>
</api>