<http://schema.org/position>
"0"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://www.discountfilterstore.com/in-line-filters.html?brand=Culligan&capacity_range=2%2C500+-+5%2C000&dir=asc&order=position&size_advertised=10-1%2F4+x+2-1%2F2>