<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cambodiaun.org/?view=article&catid=54%3Ajan-2012&id=255%3Aeccc-cambodia-un-joint-statement&format=pdf&option=com_content&Itemid=22>