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