<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.greentrailtourism.com/index.php?option=com_content&view=article&id=2711:tay-do-hotel&catid=121:cantho-hotel&Itemid=79&book=booknow>