<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/ebook/Living-with-Agenda-21?bookId=3a7c4243-8c2d-4be1-9b8f-7fc2e7869395>