3.3.2. Application Definitions

A description of each NeXus application definition is given. NeXus application definitions define the minimum set of terms that must be used in an instance of that class. Application definitions also may define terms that are optional in the NeXus data file. The definition, in this case, reserves the exact term by declaring its spelling and description. Consider an application definition as a contract between a data provider (such as the beam line control system) and a data consumer (such as a data analysis program for a scientific technique) that describes the information is certain to be available in a data file.

Use NeXus links liberally in data files to reduce duplication of data. In application definitions involving raw data, write the raw data in the NXinstrument tree and then link to it from the location(s) defined in the relevant application definition.

NXarchive

This is a definition for data to be archived by ICAT (http://www.icatproject.org/).

NXarpes

This is an application definition for angular resolved photo electron spectroscopy.

NXcanSAS

Implementation of the canSAS standard to store reduced small-angle scattering data of any dimension.

NXdirecttof

This is a application definition for raw data from a direct geometry TOF spectrometer

NXfluo

This is an application definition for raw data from an X-ray fluorescence experiment

NXindirecttof

This is a application definition for raw data from an indirect geometry TOF spectrometer

NXiqproc

Application definition for any \(I(Q)\) data.

NXlauetof

This is the application definition for a TOF laue diffractometer

NXmonopd

Monochromatic Neutron and X-Ray Powder diffractometer

NXmx

functional application definition for macromolecular crystallography

NXrefscan

This is an application definition for a monochromatic scanning reflectometer.

NXreftof

This is an application definition for raw data from a TOF reflectometer.

NXsas

Raw, monochromatic 2-D SAS data with an area detector.

NXsastof

raw, 2-D SAS data with an area detector with a time-of-flight source

NXscan

Application definition for a generic scan instrument.

NXspe

NXSPE Inelastic Format. Application definition for NXSPE file format.

NXsqom

This is the application definition for S(Q,OM) processed data.

NXstxm

Application definition for a STXM instrument.

NXtas

This is an application definition for a triple axis spectrometer.

NXtofnpd

This is a application definition for raw data from a TOF neutron powder diffractometer

NXtofraw

This is an application definition for raw data from a generic TOF instrument

NXtofsingle

This is a application definition for raw data from a generic TOF instrument

NXtomo

This is the application definition for x-ray or neutron tomography raw data.

NXtomophase

This is the application definition for x-ray or neutron tomography raw data with phase contrast variation at each point.

NXtomoproc

This is an application definition for the final result of a tomography experiment: a 3D construction of some volume of physical properties.

NXxas

This is an application definition for raw data from an X-ray absorption spectroscopy experiment.

NXxasproc

Processed data from XAS. This is energy versus I(incoming)/I(absorbed).

NXxbase

This definition covers the common parts of all monochromatic single crystal raw data application definitions.

NXxeuler

raw data from a four-circle diffractometer with an eulerian cradle, extends NXxbase

NXxkappa

raw data from a kappa geometry (CAD4) single crystal diffractometer, extends NXxbase

NXxlaue

raw data from a single crystal laue camera, extends NXxrot

NXxlaueplate

raw data from a single crystal Laue camera, extends NXxlaue

NXxnb

raw data from a single crystal diffractometer, extends NXxbase

NXxrot

raw data from a rotation camera, extends NXxbase