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CEN TS 15531 Service Interface for Real-time Information (SIRI)

SIRI was established as European standard in October 2006.

The latest version dates from 2022.

The Standard-Document can be purchased at the national Standardisation bodies such as Beuth Verlag (Search for: TS 15531)
”Service interface for real-time information relating to public transport operations” SIRI, is a XML protocol for exchange of public transport real-time information. The CEN standard is based on Transmodel.

Service interface for real-time information relating to public transport operations, SIRI consist of three main parts:
CEN TS 15531-1
- Part 1: Context and framework
CEN TS 15531-2
- Part 2: Communications infrastructure
CEN TS 15531-3
- Part 3: Functional service interfaces

and additional parts:
CEN/TS 15531-4
- Part 4: Functional service interfaces: Facility Monitoring (CEN/TS 15531-4)

CEN/TS 15531-5
- Part 5: Functional service interfaces - Situation Exchange (CEN/TS 15531-05)

CEN/TS 15531-6
– Part 6: Control Action

CEN/TS 15531-7
– Part 7 Passenger Real-Time Information European Profile


XSD-Schema (2.1) for SIRI V2.1 (2022)

XSD-Schema (o) for SIRI V2.0 (2015).

Development of the XSD takes place at  https://github.com/SIRI-CEN/SIRI

Updated versions of SIRI are prepared by CENT TC 278 WG3 SG7.

Comments or Change Requests are welcome.


Please contact  Winfried Bruns (subgroup leader) for further information.


Relationship SIRI - VDV453/454

The VDV Real Time Interfaces 453&454 are widely used in Germany. They have been a major input to the European standard SIRI. Thus they can be interpreted as to be the subset of SIRI to be used in Germany.
Please note that the flat structures in SIRI 1.0, which had been introduced in the first SIRI version for backward compatibility with legacy systems have been deleted in the version 2.0 of SIRI:
You should not use the structures with a name ending on „AsGroup“ but the standard-structures. Example: Use structure “MonitoredVehicleJourney“ instead of “MonitoredVehicleJourneyAsGroup". The latter ones have been deleted in the SIRI Version 2.0.


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