<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4wd.com/Doors-Door-Accessories/Arm-Rest.aspx?t_c=87&t_s=503&t_pt=7769&t_pn=RUG11820.20>