<https://www.kobo-touch.info/reading/%e5%8f%88%e5%90%89%e7%9b%b4%e6%a8%b9%e3%81%95%e3%82%93%e3%81%ae%e5%88%9d%e6%96%b0%e6%9b%b8%e3%80%8c%e5%a4%9c%e3%82%92%e4%b9%97%e3%82%8a%e8%b6%8a%e3%81%88%e3%82%8b%e3%80%8d/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.kobo-touch.info/reading/%E5%8F%88%E5%90%89%E7%9B%B4%E6%A8%B9%E3%81%95%E3%82%93%E3%81%AE%E5%88%9D%E6%96%B0%E6%9B%B8%E3%80%8C%E5%A4%9C%E3%82%92%E4%B9%97%E3%82%8A%E8%B6%8A%E3%81%88%E3%82%8B%E3%80%8D/>