<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.stavangervarmesenter.no/?page=shop.product_details&product_id=109&flypage=flypage.tpl.sd&pop=0&option=com_virtuemart&Itemid=116>