<https://support.wawaoffice.jp/faq/8044/attachment/%e6%89%bf%e8%aa%8d/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://support.wawaoffice.jp/faq/8044/attachment/%E6%89%BF%E8%AA%8D/>