<https://easylife.tw/9286>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://easylife.tw/entry/%E5%B0%8F%E7%B1%B3%E6%89%8B%E7%92%B0-6-%E6%9C%89%E5%93%AA%E4%BA%9B%E5%8D%87%E7%B4%9A%EF%BC%9F%E4%B8%8A%E5%B8%82%E5%8F%8A%E5%94%AE%E5%83%B9%E8%B3%87%E8%A8%8A%E6%95%B4%E7%90%86>