<https://anq39.com/2020/10/22/%e6%9c%b3%e5%b7%ae%e5%b2%b3%ef%bb%bf-2005-8-6-7/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://anq39.com/2020/10/22/%E6%9C%B3%E5%B7%AE%E5%B2%B3%EF%BB%BF-2005-8-6-7/>