Chronologically related files with the same file attributes can be managed in BS2000 in socalled file generation groups (FGGs). The files belonging to an FGG are called “file generations” or simply “generations”.
File generation groups are intended for the storage of large amounts of data for relatively long periods, e.g. the data resulting from regularly executed jobs, and the book-keeping data stored in tape pools. They also offer a convenient method of saving data based on the grandfather-father-son principle.
Executable programs or procedures cannot be stored in file generation groups. If they are stored as file generations, they must be transferred to “normal” files before they can be executed.
The group name is subject to the same rules as a file name in BS2000 (see section "File names"), with the difference that the maximum length of the name is restricted to 34 characters, since a generation number is added to the file name to identify the generations. File generations can thus be addressed via the group name and the appropriate generation number.
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