<https://www.studio-wazen.com/post/\u30C8\u30FC\u30AF\u30B7\u30E7\u30FC\u306E\u3054\u611F\u60F3>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.studio-wazen.com/post/%E3%83%88%E3%83%BC%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%BC%E3%81%AE%E3%81%94%E6%84%9F%E6%83%B3>