<http://schema.org/position>
"0"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://www.discountfilterstore.com/air-filters-by-type.html?dir=asc&media_primary_filter=Pleated+Fabric&order=position&size_advertised=16+x+20+x+4-1%2F4>