<http://schema.org/position>
"4"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://product.rakuten.co.jp/product/SONY+ZS-E80%28P%29/a2614a54da34121fc9a604244d9021ff/summary/1/?sc=0&l2-id=pdt_filter_all>