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