<http://schema.org/position>
"1"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://www.discountfilterstore.com/air-filters-by-type.html?amp%3Border=position&brand=Tier1&dir=asc&size_advertised=20+x+25-1%2F4+x+3-1%2F2>