<https://kansei-p.jp/2022/09/06/%e3%82%af%e3%83%bc%e3%81%a1%e3%82%83%e3%82%93%ef%bc%88%e6%8a%bc%e7%94%b0%e6%a7%98%ef%bc%89/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://kansei-p.jp/2022/09/06/%E3%82%AF%E3%83%BC%E3%81%A1%E3%82%83%E3%82%93%EF%BC%88%E6%8A%BC%E7%94%B0%E6%A7%98%EF%BC%89/>