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>
    <recentchanges>
      <rc type="edit" ns="14" title="Category:MSJ" rcid="2914" pageid="1723" revid="2881" old_revid="2849" timestamp="2013-05-23T23:59:28Z" />
      <rc type="new" ns="0" title="Kakalios: The Amazing Story of Quantum Mechanics" rcid="2913" pageid="1734" revid="2880" old_revid="0" timestamp="2013-05-23T23:57:57Z" />
      <rc type="new" ns="0" title="Kean: The Violinist&#039;s Thumb" rcid="2912" pageid="1733" revid="2879" old_revid="0" timestamp="2013-05-23T23:49:21Z" />
      <rc type="edit" ns="0" title="Heisenberg: Physics and Philosophy" rcid="2911" pageid="1732" revid="2878" old_revid="2877" timestamp="2013-05-23T23:42:20Z" />
      <rc type="new" ns="0" title="Heisenberg: Physics and Philosophy" rcid="2910" pageid="1732" revid="2877" old_revid="0" timestamp="2013-05-23T23:34:27Z" />
      <rc type="edit" ns="10" title="Template:Numbers" rcid="2909" pageid="1729" revid="2876" old_revid="2875" timestamp="2013-05-23T23:29:42Z" />
      <rc type="edit" ns="10" title="Template:Numbers" rcid="2908" pageid="1729" revid="2875" old_revid="2873" timestamp="2013-05-23T23:27:33Z" />
      <rc type="edit" ns="0" title="Ryan: Sex at Dawn" rcid="2907" pageid="1730" revid="2874" old_revid="2870" timestamp="2013-05-23T23:26:57Z" />
      <rc type="edit" ns="10" title="Template:Numbers" rcid="2906" pageid="1729" revid="2873" old_revid="2872" timestamp="2013-05-23T23:26:01Z" />
      <rc type="edit" ns="10" title="Template:Numbers" rcid="2905" pageid="1729" revid="2872" old_revid="2866" timestamp="2013-05-23T23:25:37Z" />
    </recentchanges>
  </query>
  <query-continue>
    <recentchanges rcstart="2013-05-23T02:55:47Z" />
  </query-continue>
</api>