<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.burton.com/default/mens-hoodies?prefn1=instock&prefn2=filterColor&prefv2=Gray&srule=Product%20Name%20-%20Descending&prefv1=true>