<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.securestate.com/blog/2013/01/22/is-your-phone-smarter-than-a-5th-grader-what-you-need-to-know-about-compliance-when-using-mobile-payment-apps>