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>
    <allpages gapcontinue="カメラモデル" />
  </query-continue>
  <query>
    <pages>
      <page pageid="22" ns="0" title="Windows7のUsersを(クリーンインストール時に)移動する法" touched="2012-07-29T13:42:24Z" lastrevid="53" counter="6053" length="2678" new="" />
      <page pageid="9" ns="0" title="おすすめプログラミング環境" touched="2011-01-22T15:35:06Z" lastrevid="19" counter="6939" length="5345" new="" />
      <page pageid="28" ns="0" title="たくさんの4x4行列の積" touched="2013-07-03T18:02:36Z" lastrevid="65" counter="5426" length="4978" new="" />
      <page pageid="20" ns="0" title="カメラの較正" touched="2011-10-23T11:36:05Z" lastrevid="47" counter="5639" length="7962" />
    </pages>
  </query>
</api>