This OECD Tax Administration 3.0 high level architecture is a model that is constructed on the basis of the KU Leuven Public Administration Architecture Framework (PAAF).
It is a work product created in the context of the OECD Tax Administration 3.0 Action plan: OECD (2022), Tax Administration 3.0 – Action Plan Update, OECD, Paris.
https://www.oecd.org/tax/forum-on-tax-administration/publications-and-products/tax-administration-3-0-action-plan-update.pdf
This work complies with the OECD Terms and Conditions, https://www.oecd.org/termsandconditions/ , section 1, (d).
PAAF is intended to be a starting point for developing an Enterprise Architecture for any Public Administration.
The framework is published by the Public Governance Institute of KU Leuven ( https://soc.kuleuven.be/io/english )
KU Leuven ( https://www.kuleuven.be ) developed this PAA framework in close cooperation with the Belgian Federal Organisation for Digital Transformation ( https://dt.bosa.be/en ), that is part of the Belgian Federal Public Service for Policy and Support ( https://www.bosa.be ).
License and copyright information.
This model is released to the public under a license : Creative Commons — Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) https://creativecommons.org/licenses/by-nc-sa/4.0/
Parts of the PAAF are based upon the use of Architectural Building Blocks (ABB) from the European Interoperability Reference Architecture (EIRA) https://joinup.ec.europa.eu/collection/european-interoperability-reference-architecture-eira/solution/eira and are protected by the ISA product license https://joinup.ec.europa.eu/collection/european-interoperability-reference-architecture-eira/solution/eira/distribution/isa-product-license-v14 which also covers the use of Archi and the Archimate language that were used to create PAAF.
The (CC BY-NC-SA 4.0) license grants the right to any Public Administration in the EU to use the PAA framework for modelling the EA of Public Administrations by referring to KU Leuven as the original author of the framework and providing feedback about any proposed improvements of the framework to KU Leuven.
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