<https://booklog.jp/hon/tag/%e3%82%aa%e3%83%bc%e3%83%ab%e8%ae%80%e7%89%a9%e6%96%b0%e4%ba%ba%e8%b3%9e#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://booklog.jp/hon/tag/%E3%82%AA%E3%83%BC%E3%83%AB%E8%AE%80%E7%89%A9%E6%96%B0%E4%BA%BA%E8%B3%9E>