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>
    <blocks>
      <block id="65" user="Shiori" by="WikiRoot" timestamp="2010-08-20T10:34:56Z" expiry="infinity" reason="" autoblock="" allowusertalk="" />
      <block id="64" user="Orange Lee" by="Kuro-to" timestamp="2010-08-20T10:18:45Z" expiry="infinity" reason="" autoblock="" allowusertalk="" />
      <block id="63" user="True Otaku" by="Kuro-to" timestamp="2010-08-20T10:13:00Z" expiry="infinity" reason="" autoblock="" allowusertalk="" />
      <block id="62" user="StepanAfemovich" by="Kuro-to" timestamp="2010-05-08T15:22:57Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="61" user="Виктор" by="Kuro-to" timestamp="2009-08-23T11:13:10Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="60" user="DarorTrocl" by="Kuro-to" timestamp="2009-08-20T01:48:17Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="59" user="OuchiLicca" by="Kuro-to" timestamp="2009-08-19T01:10:39Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="58" user="SitdaRacel" by="Kuro-to" timestamp="2009-08-17T07:03:40Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="57" user="DomacElchi" by="Kuro-to" timestamp="2009-08-16T01:55:11Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
      <block id="55" user="SergeuSikalov" by="Kuro-to" timestamp="2009-08-10T11:32:43Z" expiry="infinity" reason="спам" autoblock="" allowusertalk="" />
    </blocks>
  </query>
  <query-continue>
    <blocks bkstart="2009-07-29T20:35:10Z" />
  </query-continue>
</api>