[NeXus-tech] [NeXus-committee] questions about NeXus data structures as per Figs 1-3 of draft paper

Pete Jemian jemian at anl.gov
Tue Aug 19 16:44:52 BST 2014



On 8/19/2014 9:37 AM, Mark Könnecke wrote:
> I also feel that recursion is not the appropriate metaphor here: you do
> not have a powder diffractometer inside
> a fluorescence beam line inside SAS inside WAX inside…… It will always
> be that you have different detectors
> looking at the same sample at the same time under different aspects.
> This is well covered with NXsubentry.

Exactly.

The complexity described here is focuses on *raw* data.  The variety of 
possible cases emphasizes an important point:

Raw data is very specific to the instrument at the time it was acquired.

A consequence is that raw data must be reduced using procedures specific 
to that instrument before it is ready for analysis by an algorithm one 
might find in a textbook or journal article.

Reduced data is expressed in terms for scientific analysis.
Application definitions might describe either raw or reduced data.

Pete


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