def std_id(code, year, opts, stdclass)
      prefix, code = strip_id_wrapper(code, stdclass)
      ret = code
      ret += ":#{year}" if year
      ret += " (all parts)" if opts[:all_parts]
      ["#{prefix}(#{ret})", code]
    end
def std_id(code, year, opts, stdclass)
      prefix, code = strip_id_wrapper(code, stdclass)
      ret = code
      ret += ":#{year}" if year
      ret += " (all parts)" if opts[:all_parts]
      ["#{prefix}(#{ret})", code]
    end
TODO: i18n
 Fofmat ID
 @param code [String]
 @param year [String]
 @param opts [Hash]
 @param stdClass [Symbol]
 @return [Array]