Changes made between version 2.0 and 1.0
The major change was moving the content from a Microsoft Word document to a Wiki. This transition allowed for content to be accessed on a section by section basis, easy cross-referencing of each section, and the ability to easily determine not only how many times a section is referenced, but also where. Specifically:
Technical section
o Reorganized into a series of technical views, citing relevant technical & de facto standards for each
o As appropriate, tools to support technical views: added
Taxonomy of data and nodes: added to Technical Views
Governance for managing the DIDO Architecture: added
Glossary of Terms (Appendix A): added
A new section on technical and de facto standards (Appendix B): added
o Data sheets for technical standards: added
o Data sheets for de facto standards: added
A new section for tools (Appendix C): added
Changes made between version 3.0 and 2.0
Architectural Views & Governance (Sections 2 & 3): General clean-up and small additions, e.g., a new Technical View ( Decentralized Finance (DeFi) Layers)
Requirements (Section 4): added
Glossary (Appendix A): expanded with additional terms
Standards Organizations (Appendix B) - standards added and/or updated
Hardware Architectures (Appendix C) - added
Operating Systems (Appendix D) - added
Tools (Appendix E) - no change
DDS Quality of Service (Appendix F) - added, to be updated in 3.x
Tests (Appendix G) - added
Acronyms (Appendix H): expanded with additional entries
Cognitive Model (Appendix I) - added
Governance Model (Appendix J) - added
Changes made between version 4.0 and 3.0
Data Taxonomy (Section 2.3.4): rewritten and expanded