<http://schema.org/position>
"2"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://product.rakuten.co.jp/product/SONY+BDP-S1500/4ab9661d8ca16580db7b8ee9f47a44d4/summary/1/?sc=2&l2-id=pdt_filter_asuraku>