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>
    <links plcontinue="721|4|People" />
  </query-continue>
  <query>
    <pages>
      <page pageid="721" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="Developer section" />
          <pl ns="0" title="Hardware device information" />
          <pl ns="0" title="News Archive" />
          <pl ns="0" title="Other sources of info" />
          <pl ns="0" title="People behind V4L-DVB" />
          <pl ns="0" title="Technical background" />
          <pl ns="0" title="User information" />
          <pl ns="0" title="What is V4L or DVB?" />
          <pl ns="0" title="Wiki - Help Wanted List" />
          <pl ns="0" title="Wiki - New Device Copy &amp; Paste Template" />
        </links>
      </page>
    </pages>
  </query>
</api>