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="Bransden_&amp;_Joachain:_Quantum_Mechanics" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bachelorprogrammet i fysikk" missing="" />
      <page ns="0" title="Balchen, Andresen og Foss: Reguleringsteknikk" missing="" />
      <page ns="0" title="Barden/Thomas: An Introduction to Differential Manifolds" missing="" />
      <page ns="0" title="Becker, Kleinsmith og Hardin: The World of the Cell" missing="" />
      <page ns="0" title="Bedriftspresentasjon" missing="" />
      <page ns="0" title="Bhattacharya, Jain, Nagpaul: Basic Abstrract Algebra" missing="" />
      <page ns="0" title="Biofysikk fordypning" missing="" />
      <page ns="0" title="Bjørn Ian Dundas" missing="" />
      <page ns="0" title="Bo-Sture Skagerstam" missing="" />
      <page pageid="1376" ns="0" title="Biofysikk" />
    </pages>
  </query>
</api>