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="Checklist_(HCO)_maintenance_Expert" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Beam Line Detectors Commissioning" missing="" />
      <page ns="0" title="Central Drift Chamber Expert" missing="" />
      <page pageid="326" ns="0" title="BTA guidelines" />
      <page pageid="62" ns="0" title="Barrel Calorimeter Commissioning" />
      <page pageid="116" ns="0" title="Barrel Calorimeter Expert" />
      <page pageid="6" ns="0" title="Barrel Calorimeter Shift" />
      <page pageid="243" ns="0" title="Beam Line Detectors Expert" />
      <page pageid="31" ns="0" title="Beam Line Detectors Shift" />
      <page pageid="60" ns="0" title="Central Drift Chamber Commissioning" />
      <page pageid="18" ns="0" title="Central Drift Chamber Shift" />
    </pages>
  </query>
</api>