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>
    <alltransclusions gatcontinue="Hidef|432" />
  </query-continue>
  <query>
    <pages>
      <page pageid="38" ns="0" title="張惠妹" />
      <page pageid="51" ns="0" title="姊妹" />
      <page pageid="82" ns="0" title="周杰倫" />
      <page pageid="260" ns="0" title="謝宇威" />
      <page pageid="398" ns="0" title="韋禮安" />
      <page pageid="403" ns="0" title="F.I.R.飛兒樂團" />
      <page pageid="406" ns="0" title="田馥甄" />
      <page pageid="410" ns="0" title="A-Lin" />
      <page pageid="434" ns="0" title="5566" />
      <page pageid="447" ns="0" title="梁文音" />
    </pages>
  </query>
</api>