<https://diary2.mariko.biz/2006/%e3%82%a2%e3%83%92%e3%83%ab%e3%81%ae%e3%83%af%e3%83%ab%e3%83%84/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://diary2.mariko.biz/2006/%E3%82%A2%E3%83%92%E3%83%AB%E3%81%AE%E3%83%AF%E3%83%AB%E3%83%84/>