You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <alllinks>
      <l ns="0" title="Beatriz Ferradás Castro Marcial" />
      <l ns="0" title="Berlín" />
      <l ns="0" title="CSS" />
      <l ns="0" title="Celso Fernández Sanmartín" />
      <l ns="0" title="Chus Pato" />
      <l ns="0" title="Como citar unha obra" />
      <l ns="0" title="Como citar unha obra" />
      <l ns="0" title="Diderot" />
      <l ns="0" title="Lisístrata" />
      <l ns="0" title="Lisístrata" />
    </alllinks>
  </query>
  <query-continue>
    <alllinks alcontinue="Literatura Galega.Lecturas opcionais.4ºESO|445" />
  </query-continue>
</api>