<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/category/adventure-literary-travel?categoryname=Adventure_Literary_Travel&categoryid=y6Hl8gOVHUufHPr7Tdhf_g&page=1&s=numpurchases>