<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/ebook/yoga-for-the-three-stages-of-life-developing-your-practice-as-an-art-form-a-physical-therapy-and-a-guiding-philosophy>