<?xml version="1.0" encoding="utf-8"?>

<!--
  Description: link must be a legal URI
  Expect:      InvalidLink{attr:application,element:extension,parent:track}
-->

<playlist version="1" xmlns="http://xspf.org/ns/0/">
  <trackList>
    <track>

      <extension application="This should be a URI" />

    </track>
  </trackList>
</playlist>