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="JLMargot" timestamp="2014-08-12T20:43:04Z" comment="Added entry for database notes" />
          <rev user="JLMargot" timestamp="2013-11-25T23:38:00Z" comment="Added EPO entry" />
          <rev user="JLMargot" timestamp="2013-04-03T00:22:30Z" comment="rewrote introduction" />
          <rev user="JLMargot" timestamp="2010-11-13T19:00:48Z" comment="changed tense" />
          <rev user="JLMargot" timestamp="2010-11-13T18:30:48Z" comment="typo in link to noteworthy targets" />
        </revisions>
      </page>
    </pages>
  </query>
  <query-continue>
    <revisions rvstartid="29" />
  </query-continue>
</api>