<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.obu.edu/calendar/?ai1ec=action~agenda%257Cpage_offset~1%257Ctime_limit~1415599201%257Ccat_ids~19%2C13%2C17>