src/XSD2PHP/lib/ZF/1.10.7/Zend/Soap/Server.php
public function validateUrn($urn)
    {
        $scheme = parse_url($urn, PHP_URL_SCHEME);
        if ($scheme === false || $scheme === null) {
            require_once 'Zend/Soap/Server/Exception.php';
            throw new Zend_Soap_Server_Exception('Invalid URN');
        }

        return true;
    }
public function validateUrn($urn)
    {
        $scheme = parse_url($urn, PHP_URL_SCHEME);
        if ($scheme === false || $scheme === null) {
            require_once 'Zend/Soap/Server/Exception.php';
            throw new Zend_Soap_Server_Exception('Invalid URN');
        }

        return true;
    }
Check for valid URN

@param  string $urn
@return true
@throws Zend_Soap_Server_Exception on invalid URN