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Designator for linearPositioningSystem [message #3738] Fri, 10 October 2025 11:58 Go to next message
Torben Brand is currently offline  Torben Brand
Messages: 214
Registered: March 2016
Senior Member
Hi,

For an unambigious designation of linear positioning system (LPS) I suggest to add the standarized <designator> sub element to <linearPositioningSystem> [1] element in Common in railML3.4.

For rerefence the <geometricPositioningSystem> [2] has a unambigious reference through to EPSG codes refered to in the crsDefinition attribute.


This for the RTCI UC in an international (cross-border) perspective.



[1] https://wiki3.railml.org/wiki/RTM:linearPositioningSystem
[2] https://wiki3.railml.org/wiki/RTM:geometricPositioningSystem

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Re: Designator for linearPositioningSystem [message #3742 is a reply to message #3738] Sat, 11 October 2025 10:29 Go to previous messageGo to next message
Mathias Vanden Auweele is currently offline  Mathias Vanden Auweele
Messages: 143
Registered: February 2025
Location: Brussels
Senior Member
I agree with Torben.

Wouldn't this also not be a good idea to extend the <designator> (and the <elementState>!) to all elements? Including topology elements.

Mathias Vanden Auweele
Railway data freelancer
https://matdata.eu
Brussels, Belgium

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Re: Designator for linearPositioningSystem [message #4067 is a reply to message #3738] Fri, 26 June 2026 09:22 Go to previous message
Larissa Zhuchyi is currently offline  Larissa Zhuchyi
Messages: 107
Registered: November 2022
Senior Member
Dear Torben

In railML 3.4 the modelling is such that linearPositioningSystem has new children start- and endNotation which refer to notationSystem. See https://development.railml.org/railml/version3/-/work_items/ 687 . The modelling was requested by German project IDX4rail where notation systems play a big role.

This element is a reference to an external database that contains description of linearPositioningSystem. On the other side it implies also unique identification of linear positioning system through this reference.

Please let us know if this modelling is sufficient for you use case.

Sincerely,

Larissa Zhuchyi – Ontology Researcher
railML.org (Registry of Associations: VR 5750)
Altplauen 19h; 01187 Dresden; Germany www.railML.org

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