<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mightyrabbitstudios.com/?La-G-om-trie-Du-Caoutchouc--Topologie---300-Exercices-Corrig-s-Pour-Le-Second-Cycle.pdf>