Version Planning
In the following chart all release dates of past, current and 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 2009 | March 2017 | restricted CC-BY-ND 2.0 | |
| 2.1 | July 2011 | March 2017 | restricted CC-BY-ND 2.0 | Downwardly compatible with V2.0 |
| 2.2 | June 11, 2013 | announcement 24 months in advance | restricted CC-BY-NC-ND 3.0 | Downwardly compatible with V2.1-V2.0 |
| 2.3 | March 10, 2016 | announcement 24 months in advance | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.2-V2.0 |
| 2.4 | October 7, 2018 | announcement 24 months in advance | restricted CC-BY-NC-ND 3.0 | Predominant downward compatible with V2.3-V2.0 |
| 2.5 | not yet decided (≥ 2019) | restricted CC-BY-NC-ND 3.0 | ||
| 3.1 beta1 | October 31, 2017 | August 30, 2018 | No (internal usage only) | based on UIC's RailTopoModel V1.1 |
| 3.1 beta2 | August 30, 2018 | November 14, 2018 | No (internal usage only) | based on UIC's RailTopoModel V1.2 |
| 3.1 RC1 | November 14, 2018 | January 30, 2019 | No (internal usage only) | based on UIC's RailTopoModel V1.2 |
| 3.1 RC2 | January 30, 2019 | February 19, 2019 | No (internal usage only) | based on UIC's RailTopoModel V1.2 |
| 3.1 | February 19, 2019 | announcement 24 months in advance | restricted CC-BY-NC-ND 4.0 | based on UIC's RailTopoModel V1.2 |
| 3.2 | not yet decided (≥ 2019) | restricted CC-BY-NC-ND 4.0 |
Last update: January 6th, 2019 by Vasco Paul Kolmorgen (see news article for more background information)