<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4wd.com/Drivetrain-Differential/Front-Retainer.aspx?t_c=12&t_s=239&t_pt=5825&t_pn=OAI18890.21>