<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.codingforums.com/post-a-php-snippet/284477-one-stop-shop-mysql-abstraction-layer-class.html?s=2697d22a505ea80c8cd50502bc6466d6>