You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query>
    <blocks>
      <block id="46" user="Zvaruj1952" by="Admin" timestamp="2011-12-21T19:11:55Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="45" user="Venture capital" by="Admin" timestamp="2011-12-21T19:11:42Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="43" user="VStaceyrtzx" by="Admin" timestamp="2011-12-21T19:11:27Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="42" user="Tommy Mesteth" by="Admin" timestamp="2011-12-21T19:11:13Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="41" user="Thaddeus Savell" by="Admin" timestamp="2011-12-21T19:10:59Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="40" user="Tara Jessup" by="Admin" timestamp="2011-12-21T19:10:44Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="39" user="Tamiko Skeete" by="Admin" timestamp="2011-12-21T19:10:29Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="38" user="Signe Brisley" by="Admin" timestamp="2011-12-21T19:10:11Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="37" user="Shelia Laundree" by="Admin" timestamp="2011-12-21T19:09:56Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
      <block id="35" user="Replikan1931" by="Admin" timestamp="2011-12-21T19:09:35Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" />
    </blocks>
  </query>
  <query-continue>
    <blocks bkstart="2011-12-21T19:09:20Z" />
  </query-continue>
</api>