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="Tuček František" />
  </query-continue>
  <query>
    <pages>
      <page pageid="565" ns="0" title="Tichý Bohuslav" touched="2012-07-29T11:47:45Z" lastrevid="1588" counter="841" length="102" new="" />
      <page pageid="566" ns="0" title="Tichý Jaroslav" touched="2012-07-29T11:48:25Z" lastrevid="1589" counter="740" length="103" new="" />
      <page pageid="45" ns="0" title="Titl Václav" touched="2011-02-17T19:40:23Z" lastrevid="830" counter="2177" length="221" />
      <page pageid="193" ns="0" title="Tomášek Josef Blažej" touched="2012-07-28T12:58:22Z" lastrevid="1453" counter="2994" length="897" />
    </pages>
  </query>
</api>