[Nexus] versioning

[Aaron Brewster]

Hi, thanks Herbert for that.  I thought I had seen it before.

Andy, I hadn't considered yet if I would be using links or not, but that
does make sense!  I'm still working through the details of my usecase.
I'll likely send more out as they firm up.

Thanks again,
-Aaron

On Wed, Apr 1, 2020 at 12:29 AM GOTZ Andrew <andy.gotz at esrf.fr> wrote:

> Aaron,
>
> thanks for bringing up this issue. Are you planning on overwriting the
> original file as you will be overwriting the original value or will you
> create a new file? Maybe using links could help in updating them.
>
> Andy
> Le 01/04/2020 à 03:26, Herbert J. Bernstein a écrit :
>
> 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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