<https://www.cool-style.com.tw/wd2/archives/628680-%e8%99%90%e8%8f%9c%ef%bc%81%e5%ad%97%e6%af%8d%e5%93%a5%e7%a0%8d%e5%a4%a7%e4%b8%89%e5%85%83%e5%be%a9%e4%bb%87%e6%a9%ab%e6%8e%83%e7%86%b1%e7%81%ab%ef%bc%8c%e8%b3%bd%e5%be%8c%e9%9c%b8%e6%b0%a3%e5%97%86>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cool-style.com.tw/wd2/archives/category/%E7%94%9F%E6%B4%BB/%E9%81%8B%E5%8B%95%E8%B3%BD%E4%BA%8B/page/331>