<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wermuth.de/Kaffeeautomaten/53065253_Siemens-TE-613501-DE-Kaffeevollautomat-EQ.6-series-300-silber.html>