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"?>
    <alllinks galcontinue="Center_for_Systemic_Peace" />
      <page ns="0" title="Census of China" missing="" />
      <page ns="0" title="Census of India" missing="" />
      <page pageid="27" ns="0" title="BGR data" />
      <page pageid="26" ns="0" title="BP data" />
      <page pageid="290" ns="0" title="Barro-Lee" />
      <page pageid="1422" ns="0" title="Basic Functionalities" />
      <page pageid="1632" ns="0" title="Basic Report (Download)" />
      <page pageid="1433" ns="0" title="Basic Report for Countries/Regions or Groupings" />
      <page pageid="78" ns="0" title="CIA World Factbook" />
      <page pageid="212" ns="0" title="Carbon Emissions Data (CDIAC)" />