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>
    <allredirects garcontinue="Debian_5.0_(Lenny)" />
  </query-continue>
  <query>
    <pages>
      <page pageid="735" ns="0" title="BIOS Upgrade" />
      <page pageid="1452" ns="0" title="Bluetooth Adapters" />
      <page pageid="2681" ns="0" title="Bluetooth Daughter Card (14 pins)" />
      <page pageid="5597" ns="0" title="Bootup sidux 2008-03 (Ουρέα) on a IdeaPad S9e" />
      <page pageid="2146" ns="0" title="Browser Keys" />
      <page pageid="2351" ns="0" title="Chipsets" />
      <page pageid="6009" ns="0" title="Colour profile" />
      <page pageid="5325" ns="0" title="CompactFlash boot drive" />
      <page pageid="1451" ns="0" title="Components and AddOns" />
      <page pageid="1996" ns="0" title="DVD and Enhanced Video Adapter (DEVA)" />
    </pages>
  </query>
</api>