<http://schema.org/position>
"2"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://product.rakuten.co.jp/product/ION+AUDIO+MAX+LP/6a79a5878340bcd865e179f29c3f2848/summary/1/?sc=2&l2-id=pdt_filter_asuraku>