<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://itknowledgeexchange.techtarget.com/itanswers/page/7/?track=NL-873&ad=883914&asrc=EM_MUP_19830375&uid=9245082>