<http://schema.org/position>
"1"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://www.discountfilterstore.com/undersink-filters.html?capacity_range=2%2C500+-+5%2C000&life_months=6&micron_rating_abs=1&size_advertised=10+x+2-1%2F2>