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>
    <alllinks>
      <l ns="0" title="Bibliography" />
      <l ns="0" title="Enterprise Architecture &amp; P3M" />
      <l ns="0" title="Enterprise Information Management" />
      <l ns="0" title="Formal training courses" />
      <l ns="0" title="How to Join" />
      <l ns="0" title="Modeling Organisational Complexity" />
      <l ns="0" title="Modelling Organisational Complexity" />
      <l ns="0" title="On-the-job learning" />
      <l ns="0" title="SEBoK" />
      <l ns="0" title="Standards" />
    </alllinks>
  </query>
  <query-continue>
    <alllinks alcontinue="Useful_Papers_and_Links" />
  </query-continue>
</api>