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="4379" ns="0" title="Main Page">
        <revisions>
          <rev user="Doe" timestamp="2013-10-24T15:35:44Z" comment="Új oldal, tartalma: „[[file:Wikicover.png|800px|link=Kezdőlap]] {| |- |valign=&quot;top&quot;| &lt;div style=&quot;margin:0px 0px 5px 0px&quot;&gt;{{Kezdőlap/Küldetések}}&lt;/div&gt; &lt;div style=&quot;margin:0px 0px 5px 0px…”" />
          <rev user="Doe" timestamp="2013-10-24T15:42:02Z" comment="" />
        </revisions>
      </page>
    </pages>
  </query>
</api>