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>
    <allpages>
      <p pageid="144" ns="0" title="Carbon FootPrint" />
      <p pageid="203" ns="0" title="Carbon FootPrint/en" />
      <p pageid="205" ns="0" title="Carbon FootPrint/es" />
      <p pageid="494" ns="0" title="Collaborazioni e scambi informativi con progetti Life+: SOL-BRINE" />
      <p pageid="206" ns="0" title="Communication Kit" />
      <p pageid="650" ns="0" title="Conferenza WIZ “El futuro de la gestión del agua potable en los municipios” (24/01/2013, Spagna)" />
      <p pageid="9" ns="0" title="Contatti" />
      <p pageid="153" ns="0" title="Contatti/en" />
      <p pageid="154" ns="0" title="Contatti/es" />
      <p pageid="15" ns="0" title="Contesto" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Contesto/en" />
  </query-continue>
</api>