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-continue>
    <allfileusages gafcontinue="SybaseCentralSybaseIQ1.png|1394" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1288" ns="14" title="Category:RepServer" />
      <page pageid="1290" ns="14" title="Category:OpenSwitch" />
      <page pageid="1318" ns="14" title="Category:IQ" />
      <page pageid="1321" ns="0" title="Capturing IQ query plans" />
      <page pageid="1323" ns="0" title="Veritas vxfs filesystem performance" />
      <page pageid="1354" ns="0" title="Installation guidelines IQ 12.6 and 12.7" />
      <page pageid="1366" ns="0" title="Transaction log - How to measure the growth" />
      <page pageid="1394" ns="0" title="Sybase Central and the IQ Agent for Sybase IQ" />
    </pages>
  </query>
</api>