<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.virtualsheetmusic.com/downloads/Indici/Canto.html?cp=1&lpg=0&orderby=Release%20date:%20New%20to%20Old&viewlistflag=0>