<https://www.e-obento.com/%e5%b0%8f%e3%81%95%e3%81%aa%e6%98%a5%e3%81%bf%ef%bd%9e%e3%81%a4%e3%81%91%e3%81%9f%ef%bc%81/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.e-obento.com/%E5%B0%8F%E3%81%95%E3%81%AA%E6%98%A5%E3%81%BF%EF%BD%9E%E3%81%A4%E3%81%91%E3%81%9F%EF%BC%81/>