[Nexus] versioning

[Herbert J. Bernstein]

Dear Aaron,
  What you are thinking of are called variants.  You will find the CIF
style of variants in the imgCIF dictionary.  The NeXus style
which is intended to fill the same role is Mark Koenecke's proposal in

http://lists.nexusformat.org/pipermail/nexus-committee/2019/000905.html

  Regards,
    Herbert

On Tue, Mar 31, 2020 at 8:40 PM Aaron Brewster <asbrewster at lbl.gov> wrote:

> Hi all, I recall there was a way in NeXus to mark a group or field in an
> existing NeXus file as old/deprecated and add a new one replacing it.  For
> example if you refined a detector position and you want to remember what
> the old position was, but any software reading the file should use the new
> position.  Can this be done?  My googling on the website didn't find it.
>
> Thanks,
> -Aaron
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