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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>
    <allpages>
      <p pageid="27204" ns="0" title="Ba Be Lake National Park" />
      <p pageid="27207" ns="0" title="Ba Be Lake National Park121" />
      <p pageid="27216" ns="0" title="Ba Be Lake National Park225" />
      <p pageid="27213" ns="0" title="Ba Be Lake National Park258" />
      <p pageid="27223" ns="0" title="Ba Be Lake National Park278" />
      <p pageid="27217" ns="0" title="Ba Be Lake National Park513" />
      <p pageid="27222" ns="0" title="Ba Be Lake National Park587" />
      <p pageid="27214" ns="0" title="Ba Be Lake National Park609" />
      <p pageid="27219" ns="0" title="Ba Be Lake National Park669" />
      <p pageid="27218" ns="0" title="Ba Be Lake National Park676" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Ba Be Lake National Park686" />
  </query-continue>
</api>