<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.getdpi.com/forum/gear-fs-or-wtb/37321-fs-leica-1-25x-magnifier-ricoh-gr1s-m6ttl-clamshell-box.html>