<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/book/Java-SOA-Cookbook/18FyQ9S6u0CIHu_CG9FlSQ?MixID=18FyQ9S6u0CIHu_CG9FlSQ&PageNumber=1>