<https://www.fp-soken.or.jp/fpnews/assets-fpnews/no768/attachment/r3-5-10-%e3%80%80%e6%b6%88%e8%b2%bb%e7%a8%8e%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e8%aa%b2%e7%a8%8e%e5%a3%b2%e4%b8%8a%e5%89%b2%e5%90%88%e3%81%ab%e6%ba%96%e3%81%9a%e3%82%8b%e5%89%b2%e5%90%88%e3%81%ae-2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.fp-soken.or.jp/fpnews/assets-fpnews/no768/attachment/r3-5-10-%E3%80%80%E6%B6%88%E8%B2%BB%E7%A8%8E%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E8%AA%B2%E7%A8%8E%E5%A3%B2%E4%B8%8A%E5%89%B2%E5%90%88%E3%81%AB%E6%BA%96%E3%81%9A%E3%82%8B%E5%89%B2%E5%90%88%E3%81%AE-2/>