<http://www.dayou.tw/blog/2022/07/13/06-%e6%b1%82%e5%a9%9a%e7%9a%84%e5%9c%b0%e9%bb%9e%e5%8f%8a%e6%99%82%e9%96%93/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.dayou.tw/blog/2022/07/13/06-%e6%b1%82%e5%a9%9a%e7%9a%84%e5%9c%b0%e9%bb%9e%e5%8f%8a%e6%99%82%e9%96%93/>