<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4wd.com/Jeep-Engine-Performance/Head-Gasket.aspx?t_c=74&t_s=555&t_pt=3267&t_pn=OAI17446.09>