<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://suficenter.org/?option=com_content&view=article&id=64%3Awhat-does-the-word-sufi-mean&catid=15%3Ateachings&Itemid=6>