<http://schema.org/itemListElement>
"@type"^^<http://www.w3.org/2001/XMLSchema#string>
<https://ja.scribd.com/document/26596330/%E7%B5%90%E6%A7%8B%E6%96%B9%E7%A8%8B%E6%A8%A1%E5%BC%8F-%E7%90%86%E8%AB%96%E8%88%87%E6%87%89%E7%94%A8>