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 Release Candidate (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 | November 5th, 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: May 6th , 2026 by Philipp Schüdde
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 alpha |
| 3.4 Beta 2 | November 19th, 2025 | April 16th, 2026 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 3 | April 16th, 2026 | June 16th, 2026 | none (test and review only) | based on RailTopoModel V1.6 alpha |
| 3.4 Beta 4 | June 16th, 2026 | Not yet announced | none (test and review only) | based on RailTopoModel V1.6 beta |
| 3.5 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 RC | September 2026 | November 5th, 2026 | none (test and review only) | based on RailTopoModel V1.6 RC |
| 3.4 Release | November 5th, 2026 | Not yet announced | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.6 |
Last update: May 6th , 2026 by Philipp Schüdde
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.