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 alcontinue="Maryland_Hall_of_Records" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="Baltimore Bar Library" />
      <l ns="0" title="Baltimore City Archives" />
      <l ns="0" title="Baltimore Privateers and Letters of Marque" />
      <l ns="0" title="Cipriano Ferrandini" />
      <l ns="0" title="Emancipation Day" />
      <l ns="0" title="George McClellan" />
      <l ns="0" title="George Washington" />
      <l ns="0" title="John James Wilson (1839-1869)" />
      <l ns="0" title="Land patent" />
      <l ns="0" title="List of schools in Oakville, Ontario" />
    </alllinks>
  </query>
</api>