<https://notes.jyvalue.com/\u57FA\u790E\u884C\u92B7\u6587\u6848\u8207\u7D20\u6750\u8A2D\u8A08/#Breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://notes.jyvalue.com/%E5%9F%BA%E7%A4%8E%E8%A1%8C%E9%8A%B7%E6%96%87%E6%A1%88%E8%88%87%E7%B4%A0%E6%9D%90%E8%A8%AD%E8%A8%88/>