Version timeline
History and 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 30st, 2021 | restricted CC-BY-NC-ND 3.0 | Downwardly compatible with V2.1-V2.0 |
| 2.3 | March 10th, 2016 | June 30st, 2024 | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.2-V2.0 |
| 2.4 | October 7th, 2018 | November, 2026 | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.3-V2.0 |
| 2.5 | September 1st, 2021 | ≥2028 | 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 | ≥2026 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.2 |
| 3.2 | April 26nd, 2022 | ≥2029 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.4 |
| 3.3 Alpha for UC LTCP |
June 6th, 2024 | August 14th, 2024 | No (working group usage only) | based on RailTopoModel V1.5 |
| 3.3 Beta | August 14th, 2024 | Release of 3.3 | No (community test usage only) | based on RailTopoModel V1.5 |
| 3.3 | November 5th, 2024 | ≥2031 | restricted CC-BY-NC-ND 4.0 | based on RailTopoModel V1.5 |
| 3.4 | ≥ 2025 | restricted CC-BY-NC-ND 4.0 |
Important: Announcements about the discontinuation of support for a version will be announced at least 24 months in advance.
Last update: June 30th, 2024 by Vasco Paul Kolmorgen (Discontinuation of 2.3; schedule for 3.3 Beta; see presentations of 45th railML conference for more background information)
Long-Term Version Timeline
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.