Version timeline
Version Timeline
In the following chart all release dates of past and current railML® versions are listed:
| 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 | none (test and review only) | all Beta and RC versions only; based on RTM V1.1 |
| 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 | Autumn 2026 | Not yet announced | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.6 |
Important: Announcements about the discontinuation of support for a version will be made at least 24 months in advance.
Last update: December 1st, 2025 by Rose Sharon Király (end of support for 3.1)
Development Timeline railML 3.4
The following chart provides an overview of the progress and the release dates of the railML® version currently under development:
| Version | Release date | Supported until | License | Comment |
|---|---|---|---|---|
| 3.4 Alpha 1 | April 17th, 2025 | none (test and review only) | based on RailTopoModel V1.6 alpha | |
| 3.4 Alpha 2 | April 17th, 2025 | August 30th, 2025 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Alpha 3 | August 30th, 2025 | November 19th, 2025 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 1 | June 17th, 2025 | November 19th, 2025 | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.4 Beta 2 | November 19th, 2025 | Spring 2026 | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.4 Beta 3 | Spring 2026 | Autumn 2026 | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.4 Beta x | Not yet announced (release only if requested by community) |
Not yet announced | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.4 | Autumn 2026 | Not yet announced | none (test and review only) | based on RailTopoModel V1.6 |
Last update: 13th January, 2026 by Rose Sharon Király
Long-Term Version Timeline Strategy
In order to offer a more holistic, long-term planning, this long-term timeline of railML's® version development was created. Its purpose is to give an overview over all upcoming versions, but please notice that it is subject to change. During the development phase of a version, the release of a Beta version is scheduled for every six months.
Please click on the image for a larger version or use the download.
Feel free to contact railML.org for further explanations, questions and remarks at any time.