<https://www.jses-solar.jp/memberonly/journal-top/journal228/p75-86/attachment/journal228-pdf75-86/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.jses-solar.jp/memberonly/journal-top/journal228/p75-86/attachment/journal228-pdf75-86>