| Correspondence IL:trackIL und IS:track [message #3500] |
Fri, 07 March 2025 14:49  |
Stéphane Kaloustian
Messages: 8
Registered: September 2024
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Junior Member |
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Dear railML Interlocking community,
In an interlocking / MMI view at SBB there exists three types of track:
- A centralized track Element (with tvdSection) => example: track 5
- A track Element whithout tvdSection (non centralized track) => example: track 46
- A virtual track Element (for train routing) => example: track 64
IL:trackIL - railML 3 Wiki states: "trackIL has a 1:1-relation to a track element in functional infrastructure" and then "refersTo (1..1)" which have 2 different meanings:
- One IL:trackIL corresponds to exactly one IS:track, and one IS:track shall not correspond to more than one IL:trackIL (in which case the drawing below is wrong)
- Problem: in this case IS:track must be interrupted at every Signal, where the tvdSection has its boundaries. For this, an element of type "border" must be placed, because a trackBegin / trackEnd can only be located at switches / bufferStops / borders / crossings
- An IL:trackIL must have one reference to an IS:track (in which case the drawing below is conform)
Please consider the images in the attached PDF file.
Questions:
- Must there be a corresponding and identical "IS:track" element for each "trackIL" element?
- If yes, how to model a virtual track element for which no physical track exists?
- If yes, how is trackIS interrupted at tvdSection-boundaries? => border@type="track"?
- Does it make sense to interrupt the "IS:track" element, even though this is only necessary from the point of view of the interlocking / control system?
Looking forward to your inputs and discussion,
Stéphane Kaloustian and Silvan Gruber
SBB Swiss Railways
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