• Fix the test suite to work with Pint release 0.21.


  • Add dependency on openscm_units > 0.5.1 for compatibility with latest pandas.

  • stop building pdf output documentation, it doesn’t support SVG and isn’t used much.

  • Drop support for Python version 3.8 to prepare for it being dropped in Numpy on April 14.


  • pr.merge: use xarray’s combine_first instead of own algorithm for better performance.

  • Fix in nan handling of to_interchange_format

  • made regexp_unit optional in nir_add_unit_information as intended already before

  • Add support for Python 3.11


  • Update to work with Pint 0.20.1.



  • add merge functions in .pr accessors for Dataset and DataArray


  • Re-release of version 0.9.0 due to error in the release procedure.


  • Drop python 3.7 support and add python 3.10 support following NEP 29.

  • Change behaviour of gas basket aggregation functions to be the same as other aggregation functions. Now, and work like Both now have a skipna argument, and operate as if skipna=True by default. Note that this is a breaking change, by default NaNs are now treated as zero values when aggregating gas baskets!


  • The latest (not-yet-released) version of xarray contains a rework of indexing and some small changes to our I/O functions are necessary to support both old and new xarray.

  • make dropna in nir_convert_df_to_long explicit

  • make nir_add_unit_information more flexible


  • Make input format more flexible for convert_ipcc_code_primap_to_primap2

  • several bug fixes in data reading

  • in data reading we now work on a copy of the input data frame to leave it unchanged


  • Require openscm-units >= 0.3 to ensure that refrigerants and AR5GWPCCF are available.

  • Make primap2 compatible with pint-xarray v0.2.1.


  • Add the publication_date property for datasets to record the date of publication, which is especially useful to record the publication date for datasets which are published continuously.

  • change to stable sphinx-autosummary-accessors version.

  • pin sphinx version to repair RTD latex builds until the upstream bug is fixed.

  • Add stringly typed data variables to the PRIMAP specification.

  • Update ensure_valid for the updated specification.

  • Enhance interchange format documentation.


  • Improve venv handling in the Makefile.

  • Split wide csv reading function into a conversion function and a wrapper

  • Add function to convert long format dataframe to interchange format

  • Add functions to help reading of different national GHG inventories

  • Add functionality to fill columns using information from other columns to csv reading and dataframe conversion functions

  • Add additional coordinates to interchange format and data reading functions

  • Pin ruamel.yaml to version 0.17.4 until is solved.

  • use sum() instead of np.sum() with generator to avoid deprecation warning

  • Write changelog entries for unreleased changes into individual files in the changelog_unreleased directory to avoid merge conflicts.

  • Bump dependency on pint-xarray to 0.2 and fix test regressions introduced by release 0.2 of pint-xarray.


  • Add read and write functionality for interchange format

  • Add csv reading capabilities in pm2io module for wide and long (tidy) CSV files.

  • Add and functions to summarize data coverage.

  • Add aggregation functions set and count which use aliasing and can reduce to a given set of dimensions, including the entity.

  • Update python packaging to use declarative style and modern setuptools.

  • Support and test python 3.9 and windows.

  • Add dataset attr for storing the terminology used for entities (and thus variable names).


  • Add the and functions for overwriting / infilling / extending data.

  • Allow for more than one source in a single Dataset / DataArray.

  • Support xarray 0.17, and therefore drop support for Python 3.6.


  • Re-release 0.3.0 to trigger zenodo.


  • Add functions for downscaling and aggregation of gas baskets and categorical baskets.

  • Add functions, docs, and tests for basic GWP handling.

  • Add Makefile target to generate patched stub files for xarray containing the primap2 API.

  • Add development documentation detailing the structure of the repository and the tools used to development of PRIMAP2.

  • Add selection and indexing which understands dimension names like area in addition to the full dimension key including the category set like area (ISO3). Works with[key] and[selection] as well as[selection].

  • Add usage documentation for all currently included functionality.

  • Access metadata easily via properties like


  • Add documentation.

  • Add tests.

  • Add continuous integration using github actions.

  • Add functions for storing to and loading from netcdf.

  • Add description of the data format.

  • Add function which ensures that a dataset is in this data format.

  • Provide all functions using a pint extension accessor.


  • First development release.