<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.msxlabs.org/forum/cevaplanmis/245694-iki-dogrunun-paralel-veya-dik-olmasi-ile-egimleri-arasindaki-iliski-nedir.html>