<http://schema.org/position>
"1"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://product.rakuten.co.jp/product/YAMAHA+SRT-1000%28B%29/c07da38aa06d70a1b556074446ef3483/summary/1/?sc=0&l2-id=pdt_filter_all>