Standards Harmonisation

Standards Harmonisation

This page summarises Standard harmonisation aspects of Transmodel v6.0.

The harmonisation work has involved comparison and analysis of other standards with Transmodel over a period of time, with the resulting modifications being integrated into a number of different areas of Transmodel, including some enhancements to the core Common Concepts model (for example, adding an abstract ROLE MODEL, and an abstract SECURITY LIST MODEL).

The requirements for additional harmonisation have been especially intensive in two particular areas:

  • Harmonisation of the Passenger Information Model (Part 6 of Transmodel v6.0). This is a natural consequence of this module being concerned with the mapping of Transmodel data elements to other APIs and formats.
  • Harmonisation of the Fare & Validation Models (Part 5 of Transmodel v6.0). This is primarily because the Fares part of Transmodel has been extensively revised to meet new requirements from the CEN NeTEx format and other related conceptual standards (see below) – reflecting developments in modern ticketing technology.

The harmonisation work to compare different standards demonstrates the value and power of Transmodel as conceptual tool for the analysis and comparison of different representations of PT data, even if they use different terminology.

  • A comparison of NeTEx and Google’s General Transit Feed Specification (GTFS) provides an especially good example of this. Some notes are included in this report.
  • A further presentation to show the strategic use of Transmodel for harmonising UK standards was developed and delivered to the British Standards Institute.

Figure 1 shows Transmodel as the basis for a family of interoperable data standards.

To download the “Report on Standards Harmonisation” click here.

Figure 1 – Transmodel related standards

Related Standards

Transport Standard Context

Transmodel has been developed under the aegis of CEN (Comité Européen de Normalisation). The CEN Transmodel standard is a conceptual model which names and represents PT info concepts for a wide set of functional areas, and which can be used to compare and understand different models.

Transmodel project outputs have previously been used both to underpin a number of CEN concrete data standards, such as CEN SIRI and CEN NeTEx, and also to rationalise national standards to allow for harmonisation and interoperability.

CEN standardization body context

CEN, Europe’s standardisation body, divides its work into committees covering different aspects of industry and technology, with a well-defined process and documentation formats.

The Transmodel standard (EN12895) is formally produced by Technical Committee 278 (TC278), Working Group 3 (WG3), Sub Group 4 (SG4). Other TC278 WG3 sub groups handle the related standards:

  • SIRI-Service interface for Real-time Information, CEN TS 15531 1-5 (SG7)
  • NeTEx: Network, Timetables and Fare Exchange, CEN TS 16614-1 to 3 (SG9), extended to cover the Alternative Modes (CEN TS 16614-5)

Three other subgroups have also links to SG4, using Transmodel as the Reference Data Model


The following picture  illustrates the interactions between Transmodel (SG4) parts 1-8 and CEN TC278 WG3 subrgoups.

There is a strong link between SG4 (Public transport -Data Model) and ISO TC204 WG3 – SWG3.1 (subgroup for GDF – Geographic Data Files).

Transmodel’s Parts