<https://pretty.presslogic.com/article/635481/\u8001\u592B\u8001\u59BB-\u6069\u611B\u6545\u4E8B-\u76F8\u611B\u5230\u8001-\u8207\u5B50\u5055\u8001>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://pretty.presslogic.com/article/635481/%E8%80%81%E5%A4%AB%E8%80%81%E5%A6%BB-%E6%81%A9%E6%84%9B%E6%95%85%E4%BA%8B-%E7%9B%B8%E6%84%9B%E5%88%B0%E8%80%81-%E8%88%87%E5%AD%90%E5%81%95%E8%80%81>