<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.getdpi.com/forum/medium-format-systems-and-digital-backs/39408-nikon-d800e-v-s-hasselblad-h4d40-end-medium-format-superiority-3.html>