[Nexus] questions about NXxas app definition
Carlos Pascual
cpascual at cells.es
Mon Aug 27 07:47:43 BST 2012
Hello,
I am trying to write a NXxas file following the Application definition from the
the "NeXus Reference" document, and I have two questions/doubts about it:
a) The monochromator energy appears as NX_CHAR type (and this is also the case
for the NXxasproc application definition). I would expect it to be NX_FLOAT
instead (that would be consistent with the NXmonochromator class definition). I
see that the source XML file [1] does not include any explicit type for this
field, so I wonder if it might be a mistake in the definition (which should be
explicit) or in the script that generates the NeXus Reference (which perhaps
defaults to NX_CHAR if no explicit type is defined?).
b) The link in the NXdata group to the absorbed beam is made to
"/entry/instrument/absorbed_beam" (which is a NXdetector group). I would
expect it to be to "/entry/instrument/absorbed_beam/data" (an NXfield)
Can somebody please clarify these things?
Cheers!
Carlos
Refs:
[1]http://svn.nexusformat.org/definitions/trunk/applications/NXxas.nxdl.xml
--
+----------------------------------------------------+
Carlos Pascual Izarra
Scientific Software Coordinator
Computing Division
Cells / Alba Synchrotron [http:/www.cells.es]
Carretera BP 1413 de Cerdanyola-Sant Cugat, Km. 3.3
E-08290 Cerdanyola del Valles (Barcelona), Spain
E-mail: cpascual at cells.es
Phone: +34 93 592 4428
+----------------------------------------------------+
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