<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.burton.com/mens-stay-warm-outerwear/stay-warm-mens,default,sc.html?prefn1=variationSize&prefv1=XXL&prefn2=filterColor&prefv2=Gray&srule=price-asc>