Version timeline
Short-Term Version Timeline
In the following chart all release dates of past, current and some future railML® versions are listed:
| Version | Release date | Supported until | License | Comment |
| 0.x | 2002-2005 | December 2005 | no (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 | No (internal usage only) | all Beta and RC versions only; based on RTM V1.1 |
| 3.1 | February 19th, 2019 | Not yet announced | 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 |
| 3.5 | ≥2028 |
Important: Announcements about the discontinuation of support for a version will be made at least 24 months in advance.
Last update: November 5th, 2024 by Vasco Paul Kolmorgen (Release for 3.3; see presentations of 46th railML conference for more background information)
Long-Term Version Timeline Strategy
In order to offer a more holistic, long-term planning, this long-term version timeline was created. Its purpose is to give an overview over all upcoming versions, but please notice that it is subject to change.
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.