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>
    <pageswithprop>
      <page pageid="1" ns="0" title="Main Page" value="Officine Robotiche WIKI" />
      <page pageid="3" ns="0" title="Getting Started (uNav)" value="Getting Started" />
      <page pageid="16" ns="0" title="Code organization (uNav)" value="Code Organization" />
      <page pageid="17" ns="0" title="Links and Downloads (uNav)" value="Links and Downloads" />
      <page pageid="20" ns="0" title="Structure of Commands (uNav)" value="Structure of Commands" />
      <page pageid="23" ns="0" title="EEprom Organization (uNav)" value="EEprom Organization" />
    </pageswithprop>
  </query>
</api>