SIRI (Service interface for real-time information relating to public transport operations) has been developed under the aegis of CEN (Comité Européen de Normalisation) and is the reference interface for data communication in public transportation systems.
The standard series EN 15531 is structured as follows (a revision is currently in progress):
Reference and Title
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EN 15531-1:2015
Public transport - Service interface for real-time information relating to public transport operations -
Part 1: Context and framework
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EN 15531-2:2015
Public transport - Service interface for real-time information relating to public transport operations -
Part 2: Communications
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EN 15531-3:2015
Public transport - Service interface for real-time information relating to public transport operations -
Part 3: Functional service interfaces
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CEN/TS 15531-4:2011
Public transport - Service interface for real-time information relating to public transport operations -
Part 4: Functional service interfaces: Facility Monitoring
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CEN/TS 15531-5:2016
Public transport - Service interface for real-time information relating to public transport operations -
Part 5: Functional service interfaces situation exchange: Situation Exchange
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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.
SIRI transport standard is formally produced by Technical Committee 278 (TC 278), Working Group 3, Sub Group 7. Other TC278 WG3 sub groups handle the related standards Transmodel (SG4), NETEX (SG9) and IFOPT -Identification of Fixed Objects in Public Transport (SG6).
As NeTEx is developed as a complementary format to SIRI, the revised version of SIRI includes references to NeTEx. SIRI refers to “Transmodel - Road transport and traffic telematics – Public transport – Reference data model”, wherever possible, which is also a basis for NeTEx.