<https://u117945.pixnet.net/blog/post/403661870-%28%e6%88%91%e6%84%9b%e4%bf%9d%e9%a4%8a%29-%26%23128149%3b%e2%9d%a4%ef%b8%8f-%e8%a7%a3%e6%b1%ba%e6%88%91%e6%b2%92%e8%be%a6%e6%b3%95%e7%9a%84%e9%82%a3%e4%ba%9b>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://u117945.pixnet.net/blog/post/403661870>