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="Bagijnestraat|3338" />
  </query-continue>
  <query>
    <alllinks>
      <l fromid="3239" ns="0" title="Baangracht" />
      <l fromid="3401" ns="0" title="Baangracht" />
      <l fromid="3521" ns="0" title="Baanman, Heertje Cornelisz. - 2 mei 1660" />
      <l fromid="2337" ns="0" title="Baansteeg" />
      <l fromid="4466" ns="0" title="Backer, Aefjen Lambertsdr. - 6 september 1676" />
      <l fromid="4403" ns="0" title="Backer, Aefjen Olphertsdr. - 2 september 1696" />
      <l fromid="4466" ns="0" title="Backer, Catharina Lambertsdr. - 1 januari 1687" />
      <l fromid="4359" ns="0" title="Backer, Cornelia Lambertsdr. - 30 juni 1684" />
      <l fromid="4466" ns="0" title="Backer, Cornelia Lambertsdr. - 30 juni 1684" />
      <l fromid="2442" ns="0" title="Bagijnestraat" />
    </alllinks>
  </query>
</api>