<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/36421-fs-nikon-af-s-80-400-vr-f-4-5-5-6d-mint-w-kirk-collar.html>