<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cambodiaun.org/?view=article&catid=46%3Ajuly-2011&id=172%3A1872011-statement-of-the-royal-government-of-cambodia&format=pdf&option=com_content&Itemid=75>