<http://geitan-blog.jp/2016/05/14/%e6%98%8e%e6%97%a5%e9%96%8b%e5%82%ac%e3%81%ae%e3%80%8c%e7%a5%9e%e6%88%b8%e3%81%be%e3%81%a4%e3%82%8a%e3%80%8d%ef%bc%81/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://geitan-blog.jp/2016/05/14/%E6%98%8E%E6%97%A5%E9%96%8B%E5%82%AC%E3%81%AE%E3%80%8C%E7%A5%9E%E6%88%B8%E3%81%BE%E3%81%A4%E3%82%8A%E3%80%8D%EF%BC%81/>