<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=210&miadt=36&miaet=1&micode=5&minr=781726&miview=inv2&milang=nl>