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Change History

Highlights of each release are described below. For more details, see our wiki (https://github.com/nexusformat/definitions/wiki/Release-Notes) which provides links to the Release Notes (itemized list of changes) for any release.

v2024.02

released 2024-02-09

This release is the result of a NIAC meeting in 2022-09, NeXus Code Camps in 2022-06 and 2023-06, and substantial work by the NeXus Community, the FAIRmat consortium and NIAC members.

Summary statistics from the GitHub definitions repository show this activity since the (previous) v2022.07 release:

activity quantity
Pull Requests 67
Issues 34
Commits 413

See the wiki for more details: https://github.com/nexusformat/definitions/wiki/releasenotes__v2024.02

New Features

Add h5wasm and H5Web to HDF tools list.

Allow recommended attribute as alias for optional, but with the recommendation that this attribute be specified.

NXxas: Added NXdata/mode to report detection method.

Add various flux fields to NXbeam.

Add virtual pixel handling to NXdetector.

Add h5py example scripts.

Add equipment_component attribute to NXtransformations.

Add countrate_correction_lookup_table to NXdetector for NXmx.

Allow axis fields to be numbers or strings and add a default_slice attribute to NXdata.

Add new NXdetector_channel base class.

Add favicon to manual web pages.

Add many new contributed definitions from FAIRmat.

Allow NeXus definitions to be created with YAML.

Add recent contributors links to NeXus classes html pages.

Improve link navigation in application definition items and collapse doc strings.

Fixes

Add missing close parenthesis in rendering of suggested target.

Amend text that mistakenly deprecated NXaperture.

Generalize NXsource type for electron sources.

Maintenance

NXdata: clarify how errors are described in documentation; remove obsolete dimension index attribute; clarify that attributes that name other fields must be existing children of group; improve documentation on axes.

NXmx: clarify pixel size, update NXbeam documentation on incident_wavelength_spectrum, make countrate_correction_lookup_table optional

NXsas: Various fields and groups changed to optional. Only those deemed necessary for data reduction are required.

NXtransformations: Add equipment_component attribute.

NXxas: data fields` changed from NX_INT to NX_NUMBER.

NXxpcs: clarify use of entry_identifier, entry_identifier_uuid, and scan_number; fix some units.

Clarify how NXbeam can be in NXinstrument groups or NXsample.

Deprecations

NXdata: deprecate errors field in favor of FIELDNAME_errors for the signal field.

v2022.07

released 2022-08-02

This is a bugfix release. See notes on wiki: https://github.com/nexusformat/definitions/wiki/releasenotes__v2022.07

v2022.06

released 2022-07-05

This release is the result of a virtual NIAC meeting in 2022-03, NeXus Code Camps in 2021-03 and 2022-06, and substantial work by both the NeXus Community and NIAC members.

Summary statistics from the GitHub definitions repository show this activity since the (previous) v2020.10 release:

activity quantity
Pull Requests 134
Issues 101
Commits 250

See the wiki for more details: https://github.com/nexusformat/definitions/wiki/releasenotes__v2022.06

Breaking Changes

  • Included PDF files moved /pdf/ to /_static/.
  • Minimum Python requirement (for testing and building documentation): 3.7
  • NXsample: Removed group named temperature.
  • NXsnsevent & NXsnshisto: category changed to application (was base)
  • Publishing workflow completely rebuilt in Python, now in /dev_tools/ directory (was in /utils/). All Python code adheres to automated code style checking (black and flake8).

New Features

  • contributed definitions:
    • atom probe microscopy
    • electron microscopy
    • ellipsometry
    • multidimensional photoemission spectroscopy
    • NXregion
    • X-ray photon correlation spectroscopy
  • Full vocabulary (names of all groups, fields, attributes, and links) now built and published in the manual.
  • NX_COMPLEX data type to describe complex numbers.
  • NX_COUNT unit type to describe counting events.

Enhancements

  • All classes provide a list of reST & HTML anchors to every defined item (groups, fields, attributes, & links).

Maintenance

  • Add
    • depends_on (field) and NXtransformations (group) to more base classes.
    • NXdetector: image_key
    • NXdetector, NXmx: countrate_correction_lookup_table
  • Change GitHub default branch to main (was master).
  • Clarify:
    • naming rule of NXDL XML files
    • symbol table in NXDL files
    • NXdetector: dimensions
    • how default attribute is used to find the plottable data
    • NXBeam: various symbols and polarization fields
  • Documentation built and published from GitHub Actions workflow
  • Switch repository default branch from master to main.
  • Units of flux corrected.
  • Various documentation revised:
    • Description of links

Deprecations

  • incr attribute of dimensionType
  • NXspecdata contributed definition withdrawn and removed.

Contributors

In addition to the NIAC members, these people have contributed to this release:

  • Advanced Light Source
    • Dylan McReynolds
    • Ron Pandolfi
    • Juliane Reinhardt
    • Padraic Shafer
  • Advanced Photon Source
    • Daniel Ching
    • Miaoqi Chu
    • Suresh Narayanan
    • Qingteng Zhang
  • Dectris
    • Sophie Hotz
    • Kal Conley
  • Diamond Light Source
    • Tim Snow
  • FAIRmat
    • Carola Emminger
    • Florian Dobener
    • Markus Kühbach
    • Andrea Albino
  • National Synchrotron Light Source II
    • Abby Giles
    • Andi Barbour

v2020.10

released 2020-12-08

v2020.1

released 2020-01-31

v2018.5

released 2018-05-15

Releases before v2018.5