<https://hsuyap.pixnet.net/blog/post/346479694-%e5%9c%b0%e9%9c%87%e8%ad%a6%e5%a0%b1%e9%80%9a%e7%9f%a5app>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://hsuyap.pixnet.net/blog/post/346479694-%E5%9C%B0%E9%9C%87%E8%AD%A6%E5%A0%B1%E9%80%9A%E7%9F%A5app>