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="Introduction" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="45" ns="0" title="Conclusion" />
      <p pageid="12" ns="0" title="Extant Hacker Typology" />
      <p pageid="22" ns="0" title="Hacker Ethics and Morals" />
      <p pageid="14" ns="0" title="Hacker Generations and Evolution" />
      <p pageid="27" ns="0" title="Hacker Innovation Cycles" />
      <p pageid="25" ns="0" title="Hacker Innovation and Consumer Artefacts" />
      <p pageid="24" ns="0" title="Hackers, Problem Solving and Innovation" />
      <p pageid="28" ns="0" title="Hackers innovation cycles" />
      <p pageid="44" ns="0" title="Hacking and Counter-cultural Rebellion" />
      <p pageid="26" ns="0" title="Implications of Hacker Innovation for Firms" />
    </allpages>
  </query>
</api>