The ITxPT collaborative community just released a new package of the Technical Specifications named Linden.

The collaboration between the members is the heart of ITxPT, and the most central result is the release of new specification versions, delivered in a named package (previously named package Sequoia has been delivered in 2022).
The Linden package focuses on updating the current Sequoia package, covering Service oriented Architecture (SoA). Linden includes minor and major releases of the specifications, read here about the version levels. 

While the Linden package will be made available to the public on 01-April-2025, the ITxPT members can already access it in the first quarter 2025 starting 31-December 2024.

Linden for members

Several improvements

The Linden update consists of clarification and introduction of new functionalities that together enhance the readability and usability of the specifications:

3 major releases

  • S02P08-MADT:
    • Removal of “path” key in DNS-SD announcement
    • Removal of the “version” tag from payload
  • S03P00-Back-office restructuration
  • S03P01-TiGR
    • Removal of TX attribute
    • Alignment of format for not valid or not available parameter

10 minor releases

  • Clarification requirements based on recurring support request
  • Fix of issues met during labeling process
  • Extension of the scope of application by introducing additional concepts collected by working groups and change requests, such as:
    • Heavy rail (S01-Installation)
    • JourneyMonitoring extension (S02P06-AVMS)
    • Occupancy (S02P07-APC)

The version updates

The Linden  package consists of minor and major update of the following specifications:

 
IDDocumentVersion
S01Installation Requirementsv2.3.0
S02P00Networks and Protocolsv2.2.0
S02P01Inventoryv2.2.0
S02P02Timev2.2.0
S02P03GNSSLocationv2.3.0
S02P04FMStoIPv2.3.0
S02P05VEHICLEtoIPv2.2.0
 
IDDocumentVersion
S02P06AVMSv2.3.0
S02P07APCv2.2.0
S02P08MADTv3.0.0
S02P09MQTTbrokerv2.3.0
S03P00Backoffice Overviewv3.0.0
S03P01TiGRv3.0.0

Read more about the version levels.

Feedback from using the specification

The ITxPT collaborative community generated valuable feedback that resulted in the Linden update. Four main activities created the most input to drive the update:

  • The implementation of the Sequoia package
  • The use of the specifications in tenders
  • The collected change requests
  • The labeling process

Change request

Your feedback and comments are essential drivers for improving specifications. Use the ITxPT change request platform if you have a comment of general interest.

 

Many thanks

Thanks to all change request contributors that enabled the current update. Also, thank you to all who reviewed the Linden package before publication.

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