<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.codingforums.com/perl-cgi/290073-appending-s-printf-output-string.html?s=79cfa3f129f10c22362e9f73d6b2e427>