<https://businessfocus.io/article/167869/\u7F8E\u570B\u64A4\u8ECD-\u963F\u5BCC\u6C57>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://businessfocus.io/article/167869/%E7%BE%8E%E5%9C%8B%E6%92%A4%E8%BB%8D-%E9%98%BF%E5%AF%8C%E6%B1%97>