<http://schema.org/query-input>
"required name=search_keywords"^^<http://www.w3.org/2001/XMLSchema#string>
<http://ejaba.net/201293/%D8%A7%D8%A8%D9%86-%D8%A7%D9%84%D9%81%D9%8A%D9%84-%D8%B4%D8%B3%D9%85%D9%87>