<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.archieven.nl/nl/zoeken?mivast=0&mizig=145&miadt=1211&miaet=18&micode=043.7&minr=761618&miview=ldt>