<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.codingforums.com/ruby-and-ruby-on-rails/262235-symbols-function-names.html?s=3c9f13d8d1897da350500a1e0b00e65d>