Re: [boost] Re: the first version of abstract path manipulation class (interface)

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 
of
 >
 >> 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 
http://www.naspa.com/PDF/2001/0501%20PDF/T0105009.pdf

It says "Normally, of course, the low-level qualifier of a generation
dataset is of the form GxxxxV00, where "xxxx" is the generation number ..."

--Beman