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>
    <querypage name="Ancientpages">
      <results>
        <page value="20051028034618" timestamp="2005-10-28T03:46:18Z" ns="0" title="Derilith" />
        <page value="20051031204612" timestamp="2005-10-31T20:46:12Z" ns="0" title="Sons of Thunder" />
        <page value="20051031205309" timestamp="2005-10-31T20:53:09Z" ns="0" title="Kyrax" />
        <page value="20051101013426" timestamp="2005-11-01T01:34:26Z" ns="0" title="Oni" />
        <page value="20051101014021" timestamp="2005-11-01T01:40:21Z" ns="0" title="Turgan" />
        <page value="20051101014344" timestamp="2005-11-01T01:43:44Z" ns="0" title="The Dark Reign" />
        <page value="20051101071404" timestamp="2005-11-01T07:14:04Z" ns="0" title="Striking Surface" />
        <page value="20051102203141" timestamp="2005-11-02T20:31:41Z" ns="0" title="Inspecting Class 1 Weapons" />
        <page value="20051102203151" timestamp="2005-11-02T20:31:51Z" ns="0" title="Inspecting Class 2 Weapons" />
        <page value="20051102203200" timestamp="2005-11-02T20:32:00Z" ns="0" title="Inspecting Class 3 Weapons" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>