<https://tivo168.pixnet.net/blog/post/266556677-%5b%e8%ae%80%e6%9b%b8%e5%bf%83%e5%be%97%5d-%e5%b7%b4%e8%8f%b2%e7%89%b9%e9%81%b8%e8%82%a1%e9%ad%94%e6%b3%95%e6%9b%b8%e4%b9%8b%e8%a8%88%e7%ae%97%e7%9b%ae%e6%a8%99%e5%83%b9%e6%a0%bc>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://tivo168.pixnet.net/blog/post/266556677>