<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4oof.com/tag/%d8%a7%d8%ba%d9%86%d9%8a%d8%a9-%d9%84%d9%85%d8%a7-%d9%88%d8%a7%d8%ad%d8%af%d8%a9-mp3>