function toRaw()
    {
        $result = File_MARC::SUBFIELD_INDICATOR.$this->code.$this->data;
        return (string)$result;
    }
function toRaw()
    {
        $result = File_MARC::SUBFIELD_INDICATOR.$this->code.$this->data;
        return (string)$result;
    }
function toRaw ( ) { $ result = File_MARC :: SUBFIELD_INDICATOR . $ this -> code . $ this -> data ; return ( string ) $ result ; }
Return the USMARC representation of the subfield

@return string USMARC representation
Return the USMARC representation of the subfield