<https://www.cckro.com/product/cto%e6%bf%be%e5%bf%83%e7%b3%bb%e5%88%97/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cckro.com/product/cto%E6%BF%BE%E5%BF%83%E7%B3%BB%E5%88%97/>