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-continue>
    <allpages gapfrom="Tableau Software Strong Out of the Gate In First Quarterly Earnings Report" />
  </query-continue>
  <query>
    <pages>
      <page pageid="10404" ns="0" title="TUGG Big Data Dinner 2013" touched="2013-02-13T19:46:15Z" lastrevid="45586" counter="8776" length="6611" />
      <page pageid="13997" ns="0" title="Tableau Conference 2014" touched="2014-09-19T13:35:21Z" lastrevid="58050" counter="23011" length="19452" />
      <page pageid="12136" ns="0" title="Tableau Customer Conference 2013" touched="2013-11-05T15:43:20Z" lastrevid="52639" counter="18501" length="16000" />
      <page pageid="14039" ns="0" title="Tableau Software Commits to Massive Research and Development Investment" touched="2014-09-18T17:00:54Z" lastrevid="58045" counter="13958" length="14666" />
    </pages>
  </query>
</api>