<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.getdpi.com/forum/4-3rds-cameras/5962-olympus-12-mp-enough.html?s=84d9a6718c25ff657d2176e827fcb2fa>