<http://schema.org/ratingValue>
"5.0E0"^^<http://www.w3.org/2001/XMLSchema#double>
<https://www.scribd.com/doc/10533753/%E6%8F%90%E5%90%8D%E8%A1%A8%E6%A0%BC-%E9%9D%92%E5%8D%94%E6%95%B8%E7%A2%BC%E9%9D%92%E5%B9%B4%E5%B0%8F%E4%B8%BB%E6%8C%81%E7%B3%BB%E5%88%972009>