<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ehattons.com/24310/Peco_Model_Railway_Products_NR_P110B_7_plank_coal_wagon_Birmingham_Co_op_No_39/StockDetail.aspx>