<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.abt.com/product/46064/Whirlpool-Duet-WFW9470WR-Cranberry-Red-Front-Load-Washer-WFW9470WR.html>