codesystem: third-party data included in this package

The extension itself is licensed under the BSD licence in LICENSE. The following data files in data/prepared/ are third-party
material, redistributed under their publishers' licences. Each has been converted to the prepared form (code, level, parent,
label) and nothing else about its content has been changed, except where noted.

NACE Rev.2 (data/prepared/nace_rev2.csv)
    Data source: Statistik Austria, Klassifikationsdatenbank, NACE Rev. 2, published on the Austrian open data portal
    (OGDEXT_KLASSDB_NACERev2_1) and listed at https://data.europa.eu/data/datasets/stat_nace-rev-2
    Licence: Creative Commons Attribution (CC BY), as stated for that dataset on the European Data Portal.
    Changes: converted from the CSV in the publisher's zip to the prepared form.

UK Standard Industrial Classification 2007 and 2003, and the equivalence between them (data/prepared/uk_sic_*.csv)
    Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
    Contains public sector information licensed under the Open Government Licence v3.0
    (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
    Changes: converted to the prepared form; two mistyped codes in the ONS list (45119 for 45112, 82922 for 82912) were corrected
    and one Companies House code (74990) left out. Details are in data/SOURCES.md.

ONS GSS entity types (data/prepared/gss_entity_types.csv)
    Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
    Contains public sector information licensed under the Open Government Licence v3.0.
    From the Register of Geographic Codes. Changes: converted to the prepared form.

Not included in this package, and subject to their owners' own terms: ISIC Rev.4 (© United Nations,
https://www.un.org/en/about-us/terms-of-use) and ISCO-08 (© International Labour Organization,
https://www.ilo.org/rights-and-permissions). The functions in tools/install_isic_isco.sql download them from the publishers on request.
