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>
    <alllinks galcontinue="Crystals_(Collectibles)" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Books Guide" missing="" />
      <page ns="0" title="Charisma Skill" missing="" />
      <page ns="0" title="Comedy Skill" missing="" />
      <page ns="0" title="Cow Plants" missing="" />
      <page ns="0" title="Creativity Skill" missing="" />
      <page pageid="392" ns="0" title="Careers Overview" />
      <page pageid="244" ns="0" title="Cheats" />
      <page pageid="396" ns="0" title="Collecting" />
      <page pageid="254" ns="0" title="Cooking Skill" />
      <page pageid="281" ns="0" title="Criminal Career" />
    </pages>
  </query>
</api>