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 apcontinue="Backup_Battery" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="735" ns="0" title="BIOS Upgrade" />
      <p pageid="5190" ns="0" title="BIOS Upgrade/X Series" />
      <p pageid="5183" ns="0" title="BIOS Upgrade:Creating a Bootable CD from a Floppy Image" />
      <p pageid="7305" ns="0" title="BIOS Upgrade Booting from a CD comments" />
      <p pageid="3990" ns="0" title="BIOS Upgrade Downloads" />
      <p pageid="5128" ns="0" title="BIOS Upgrade With only USB" />
      <p pageid="7306" ns="0" title="BIOS Upgrade success failure" />
      <p pageid="8032" ns="0" title="BIOS Version" />
      <p pageid="5792" ns="0" title="BIOS update without optical disk" />
      <p pageid="943" ns="0" title="Backing up the preloaded OS" />
    </allpages>
  </query>
</api>