<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/book/Front-and-Center/88ZRK_u30EeEbOtxG8pVcw?MixID=88ZRK_u30EeEbOtxG8pVcw&PageNumber=1>