Changes in version 1.26.4 (2026-04-30)                 

  - Added new function to calculate xo-index.
  - Minor performance upgrades to all functions.
  - Implementing new package version nomenclature to represent CRAN
    upload date.
  - Added citation to preprint.

                 Changes in version 1.3.1 (2026-01-12)                  

  - Major performance upgrades.
  - Fixed issue where sometimes an inaccurate list of core
    keywords/categories were printed.

                        Changes in version 1.3.0                        

  - Introduced different variants of the xd-index, such as fractional,
    field-normalised, and the inverse variance weighted xd-index.

                 Changes in version 1.2.4 (2025-06-16)                  

  - Minor performance upgrades.

                 Changes in version 1.2.3 (2024-08-17)                  

  - Small update to integrated functions.

                        Changes in version 1.2.0                        

  - Added options to compute h-type and g-type values of x-type indices.

                 Changes in version 1.1.0 (2024-06-21)                  

  - Added function 'xc_index' for calculating xc-index.
  - Added a generic function 'xdc_index' which can be used to calculate
    x-index, xd-index, and xc-index.
  - Added functions 'h_index' and 'g_index' for calculating h-index and
    g-index respectively.
  - Optimised functions for better performance and faster run times.
  - Fixed author's ORCiD.

                 Changes in version 1.0.0 (2024-05-22)                  

  - Added new functionality for visualising plots for x- and xd-indices.
  - Subtle changes in first examples of x- and xd-indices. Default
    delimiter ";" not included in example 1 anymore. Examples updated to
    demonstrate plotting parameter.

                 Changes in version 0.0.1 (2024-05-15)                  

  - Initial CRAN submission.