[Nexus] NXarchive / compression standards

[Görzig, Heike]

Hi Nicolas, hi Ben,

The NXarchive application is giving a minimum of provenance information and
lets someone not involved in the measurement know what the measurement was
about and who was involved in the measurement. Although some fields perhaps
could be revised. My interpretation of this application definition would be:
if an archived dataset does not have this information, it would not comply
with the reusable (R) requirement of FAIR 

Maybe the description relating it to the ICAT is a bit misleading. 

 

Best wishes,

Heike

 

Von: NeXus <nexus-bounces at shadow.nd.rl.ac.uk> Im Auftrag von Watts Benjamin
(PSI) via NeXus
Gesendet: Dienstag, 19. April 2022 13:15
An: nexus at nexusformat.org; Discussion forum for the NeXus data format
<nexus at shadow.nd.rl.ac.uk>
Cc: Watts Benjamin (PSI) <benjamin.watts at psi.ch>
Betreff: Re: [Nexus] NXarchive / compression standards

 

Hi Nicolas,

   NXarchive was discussed and accepted by the NIAC a long time ago and
hasn't had any significant updates since. I think you might need to talk to
the ICAT project to get further detail. Perhaps you could encourage the ICAT
project to provide updates for the NXarchive documentation, if it is
warranted/useful. For HDF5 compression, we generally recommend sticking to
the compression filters already included in the HDF libraries, like ZLIB.

 

Cheers,

Ben

 

  _____  

From: NeXus <nexus-bounces at shadow.nd.rl.ac.uk
<mailto:nexus-bounces at shadow.nd.rl.ac.uk> > on behalf of Nicolas Soler via
NeXus <nexus at shadow.nd.rl.ac.uk <mailto:nexus at shadow.nd.rl.ac.uk> >
Sent: Monday, 11 April 2022 7:24 PM
To: nexus at nexusformat.org <mailto:nexus at nexusformat.org> 
Cc: Nicolas Soler
Subject: [Nexus] NXarchive / compression standards 

 

Dear all,

I'm new to this list so I may be inquiring about topics that have been
discussed before. But anyway, I have two questions here:

1) I have noticed the presence of NXarchive in the application definitions.
Does anybody know more about it beyond the provided description? (This is a
definition for data to be archived by ICAT).

2) What about compression filters applied to the underlying HDF5 files? Is
the rule to apply ZLIB by default or were there discussions or
recommendation around particular techniques and associated data structures?

Many thanks in advance for your insights!

Nicolas

-- 

 


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