<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.iranoa.ir/index.php?option=com_content&view=article&id=190:1390-09-05-14-11-57&catid=63:1390-06-16-03-48-01&Itemid=109>