<https://group.rdc-run.com/archives/blog/%e3%83%a8%e3%83%bc%e3%83%ad%e3%83%83%e3%83%91%e9%81%a0%e5%be%814%e6%97%a5%e7%9b%ae-%e3%82%b9%e3%83%94%e3%83%bc%e3%83%89%e3%83%88%e3%83%ac%e3%83%bc%e3%83%8b%e3%83%b3%e3%82%b0/#mainImage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://group.rdc-run.com/archives/blog/%E3%83%A8%E3%83%BC%E3%83%AD%E3%83%83%E3%83%91%E9%81%A0%E5%BE%814%E6%97%A5%E7%9B%AE-%E3%82%B9%E3%83%94%E3%83%BC%E3%83%89%E3%83%88%E3%83%AC%E3%83%BC%E3%83%8B%E3%83%B3%E3%82%B0>