<https://www.chustudy.com/post/\u8FD1\u534A\u5B89\u7701\u5927\u5B66\u751F\u5B66\u4E60\u80FD\u529B\u4E0D\u8DB3>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.chustudy.com/post/%E8%BF%91%E5%8D%8A%E5%AE%89%E7%9C%81%E5%A4%A7%E5%AD%A6%E7%94%9F%E5%AD%A6%E4%B9%A0%E8%83%BD%E5%8A%9B%E4%B8%8D%E8%B6%B3>