<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?collectionID=stay-warm-mens&prefn1=instock&prefv1=false&prefn2=variationSize&prefv2=XL&srule=price-asc>