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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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20100428113140" timestamp="2010-04-28T11:31:40Z" ns="0" title="Klaus wiki:About" />
        <page value="20100428113216" timestamp="2010-04-28T11:32:16Z" ns="0" title="Klaus wiki:Privacy policy" />
        <page value="20100428113321" timestamp="2010-04-28T11:33:21Z" ns="0" title="Klaus wiki:General disclaimer" />
        <page value="20100428204125" timestamp="2010-04-28T20:41:25Z" ns="0" title="Source code syntaxhighlighter installation" />
        <page value="20100428210729" timestamp="2010-04-28T21:07:29Z" ns="0" title="General about Wikies" />
        <page value="20100505124334" timestamp="2010-05-05T12:43:34Z" ns="0" title="Cppunit" />
        <page value="20100506120247" timestamp="2010-05-06T12:02:47Z" ns="0" title="Graphical overview installation" />
        <page value="20100614064713" timestamp="2010-06-14T06:47:13Z" ns="0" title="Configuring Java on Fedora/Centos" />
        <page value="20100628100101" timestamp="2010-06-28T10:01:01Z" ns="0" title="Graphical overview" />
        <page value="20100709071227" timestamp="2010-07-09T07:12:27Z" ns="0" title="Upgrade Fedora" />
      </results>
    </querypage>
  </query>
</api>