<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://itknowledgeexchange.techtarget.com/itanswers/page/181/?track=NL-873&ad=881474&asrc=EM_MUP_18572848&uid=14684563>