Version Timeline
railML Versions
The following chart lists all release dates of currently supported railML® versions:
| Version | Release date | Supported until | License | Comment |
|---|---|---|---|---|
| 0.x | 2002-2005 | December 2005 | none (internal usage only) | Beta version timetable |
| 1.0 | December 2005 | June 2013 | proprietary | First practical experience |
| 1.1 | November 2007 | June 2013 | proprietary | |
| 2.0 | November 2nd, 2009 | March, 2017 | restricted CC-BY-ND 2.0 | |
| 2.1 | June 15th, 2011 | March, 2017 | restricted CC-BY-ND 2.0 | Downwardly compatible with V2.0 |
| 2.2 | June 11th, 2013 | June 30th, 2021 | restricted CC-BY-NC-ND 3.0 | Downwardly compatible with V2.1-V2.0 |
| 2.3 | March 10th, 2016 | June 30th, 2024 | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.2-V2.0 |
| 2.4 | October 7th, 2018 | November 30th, 2026 | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.3-V2.0 |
| 2.5 | September 1st, 2021 | Not yet announced | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.4-V2.0 Also adopted as an ISO 4398:2022 standard |
| 3.0 | October 31st, 2017 | February 19th, 2019 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.2 |
| 3.1 | February 19th, 2019 | December 31st 2027 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.2 |
| 3.2 | April 26th, 2022 | Not yet announced | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.4 |
| 3.3 | November 5th, 2024 | Not yet announced | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.5 |
| 3.4 | November 5th, 2026 | Not yet announced | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.6 |
| Latest Version | Supported Version | Future Version | Unsupported Version |
Important: Announcements about the discontinuation of support for a version will be made at least 24 months in advance.
Last update: July 14th , 2026
railML 3.4 Development
The following chart provides an overview of the progress and release dates of railML® version 3.4 currently under development:
| Version | Release date | Supported until | License | Comment |
|---|---|---|---|---|
| 3.4 Alpha 1 | Early 2025 | April 16th, 2025 | none (test and review only) | based on RailTopoModel V1.5 |
| 3.4 Alpha 2 | April 16th, 2025 | August 20th, 2025 | none (test and review only) | based on RailTopoModel V1.5 |
| 3.4 Alpha 3 | August 20th, 2025 | November 19th, 2025 | none (test and review only) | based on RailTopoModel V1.5 |
| 3.4 Beta 1 | June 17th, 2025 | November 19th, 2025 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 2 | November 16th, 2025 | April 16th, 2026 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 3 | April 16th, 2026 | June 17th, 2026 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 4 | June 17th, 2026 | August 31st, 2026 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 5 | August 31st, 2026 | October 7th, 2026 | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.4 RC | October 7th, 2026 | November 5th, 2026 | none (test and review only) | based on RailTopoModel V1.6 RC |
| 3.4 Final | November 5th, 2026 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.6 |
| Latest Version | Future Version | Preview Version |
Last update: July 14th, 2026
Long-Term Version Timeline
This chart provides a holistic, long-term overview of railML® versions — covering all released and currently supported versions, versions in active development, and upcoming releases. During the development of a new version, a beta release is scheduled approximately every six months.
Please note that this chart is subject to change.
Feel free to contact railML.org for further explanations, questions and remarks at any time.