<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bulbs.com/1-Number_of_Lamps/$10_--_$50/Outdoor-Fixtures-Category/Yes-Damp_Location/None-Bulb_Type_Supplied/results.aspx>