<https://m123540303.pixnet.net/blog/post/470825324-%e6%97%a9%e9%a4%90%e6%96%b0%e9%81%b8%e6%93%87%7e%e5%b0%88%e5%88%a9%e7%b6%a0%e7%87%95%e9%ba%a5-%e8%94%ac%e6%9e%9c%e7%b2%be%e5%8a%9b%e6%b9%af%e8%bc%95%e9%ac%86%e9%96%8b%e5%95%9f>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://m123540303.pixnet.net/blog/post/470825324>