<kml xmlns="http://www.opengis.net/kml/2.2">
  <Document>
    <NetworkLink>
      <name>bar</name>
      <Link>
        <href>/bar/bar.kml</href>
      </Link>
    </NetworkLink>
  </Document>
  <Folder>
    <NetworkLink>
      <Link>
        <href>http://foo.com/foo.kml</href>
      </Link>
    </NetworkLink>
  </Folder>
</kml>