From: Beman Dawes (bdawes_at_[hidden])
Date: 2002-01-27 19:56:53
At 07:10 PM 1/27/2002, Matt Austern wrote:
>Beman Dawes wrote:
>> At 10:40 AM 1/25/2002, George A. Heintzelman wrote:
>> ... mention of version numbers ...
>> Don't the traditional IBM mainframe operating systems also have such a
>> concept? I think they may be called "generation data sets" or similar.
>> That's from 30 years ago, but I'm under the impression that descendents
>> those OS's are still in heavy use.
>I've only used one IBM mainframe OS, and it didn't have version numbers.
>VMS, on the other hand, does have version numbers. VMS is an interesting
>test case for a path manipulation library, because it differs in many
>ways from what we're used to in UNIX/Windows.
I just checked, and apparently IBM's OS/390 does still support generation
datasets, which is IBM-speak for version numbers. See
It says "Normally, of course, the low-level qualifier of a generation
dataset is of the form GxxxxV00, where "xxxx" is the generation number ..."
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