<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4wheelparts.com/Side-Steps-and-Running-Boards/Platinum-CPS-Step-Pad.aspx?t_c=70&t_s=75&t_pt=3485&t_pl=4687&t_pn=WES60-2175>