The Basic Directory IOD includes the Modules specified by Table F.3-1.
Table F.3-1BASIC DIRECTORY IOD MODULES
|File-set Identification||F.3.2.1||M||File-set identification information|
|Directory Information||F.3.2.2||U||Directory Information followed by a Sequence of Directory Records. Note: The Directory Information Module is optional. This Directory Information Module should be present in all but primitive environments where a directory is not needed. In this case, only the File-set Identification Information is present.|