[Nexus] Beamline description using Nexus

Benjamin Watts benjamin.watts at psi.ch
Tue Jan 23 10:36:48 GMT 2018

Hi Heike,
    This might be nitpicking language a bit, but I think it is important 
to be clear. Your intended use of the NeXus format is not "out of scope" 
at all, it is just an area that hasn't seen much dedicated work 
previously, due to limited resources. I think everyone will agree that 
we are happy to see you using NeXus in this way and we appreciate you 
making this effort to do things "correctly". You can expect strong 
support from the NeXus community.


On 22/01/18 18:03, Heike Görzig wrote:
> Thanks a lot for all your replies.
> With the answer of Ray I can continue working, because I really was
> stuck here. Everything else of the beamline is modeled so far.  I also
> have added the fields for slope error and the size of the mirror.
> I think I asked a bit wrong, I just wanted to know how you were doing
> things, so I could use the same way, same vocabulary and units. I
> understand the part of the fields might be something for the NIAC. --> I
> will discuss this with Jens-Uwe Hoffmann.
> About the application definition: I saw NXarchive wich is for ICAT,
> thats why I thought there might be a definition/policy for simulations
> or calibration/commissioning in some facility. I know this is out of
> scope of the nexusformat, but might be useful for validation of 
> experiments.
> I will discuss further with Jens-Uwe Hoffmann.
> Regards,
> Heike
> On 22.01.2018 17:08, Pete Jemian wrote:
>> Heike:
>> Thanks for checking in.
>> On 1/22/2018 9:17 AM, Koennecke Mark (PSI) wrote:
>>> You create a new group and give it the type NXgrating. Then add
>>> fields matching the
>>> description of NXgrating.
>> ...
>>> NeXus, by tradition, has been very neutron centric. It can very well
>>> be that there are fields missing, ....
>> You should also feel free to add any fields you see are missing. The
>> NeXus standard allows for the use of any field which is not already
>> defined.  If you do introduce a new field, please make sure it is
>> truly missing and that the name does not duplicate what is already in
>> use. This is when members of the NIAC can be most helpful since they
>> are aware of fields in other definitions.  Some other definitions may
>> already be using the concept of what you wish to describe and the NIAC
>> can identify that.
>> Pete
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