[NeXus-definitions-tickets] [NeXusDefinitions] #114: Create NXDL for SNS event data

[NeXus Base Classes and Instrument Definitions]

#114: Create NXDL for SNS event data
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Reporter:  Marie  |       Owner:  Marie   
    Type:  task   |      Status:  assigned
Priority:  major  |   Milestone:          
Keywords:         |  
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Comment(by Pete Jemian):

 ''Marie Yao'' replied

 Thanks Pete J and Pete P!

 I will ask HistoTool folks to change the type of "DASlogs" from "NXgroup"
 to "NXcollection" in their future release. Is there a way to specify
 relationship like "one NXgroup or one NXcollection" in NXDL? Or we will
 need two pairs of definitions (before and after the change) to validate
 SNS histo and event NeXus files?

 As for "NXchopper", I found "NXdisk_chopper" and "NXfermi_chopper" in
 NeXus base_classes, and I believe we have both here at SNS, plus bandwidth
 choppers and fast counter-rotating disk choppers. It would be nice if we
 have some umbrella type like "NXchopper"... Otherwise it seems that we'll
 have to update all of our geometry input files, changing "NXchopper" to
 "NXdisk_chopper" or "NXfermi_chopper" as appropriate. (BTW, if this is the
 case, do we need to add some new base_classes for bandwidth choppers and
 fast counter-rotating disk choppers?) And after that I can specify both
 "NXdisk_chopper" and "NXfermi_chopper" (and new chopper types, if any) in
 NXsnsevent.nxdl.xml and NXsnshisto.nxdl.xml.

 Please advise.

 Thank you,

 Marie

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Ticket URL: <http://trac.nexusformat.org/definitions/ticket/114#comment:6>
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NeXus Base Classes and Instrument Definitions