VDV-Real Time Data Interface (using SIRI)
Real Time Data Interface – VDV Recommendation 453
- Connection protection
- Reference data service for transfer protection (REF-CP)
- Process data service for transfer protection (CP)
- Dynamic passenger information
- Reference data service for passenger information (REF-DPI)
- Process data service for passenger information (DPI)
- VIS Visualisation
- GM General message service
Real Time Data Interface – VDV Recommendation 454
- Schedule Information
- Reference data service for timetable information (REF-SIS)
- Process data service for timetable information (SIS)
The VDV recommendations with the common title "Real Time Data Interface" - the above mentioned numbers 453 and 454 as well as 459 "Real Time Data Interface for Demand-Controlled Transport" (only in German) make use of the standard CEN/TS 15531 'Service Interface for Real Time Information (SIRI)'. They represent the subset of the CEN standard to be used in Germany.
From the different communication methods described in SIRI in VDV 453 the communication method "publish/subscribe" is chosen for the use in the VDV-context.
Furthermore the VDV recommendations reduce the number of optional data elements described in SIRI to a well defined selection, which has proven its efficiency in numerous real time projects in Germany and neighbouring countries.
VDV-Interfaces for Planned Data
On the basis of Transmodel and NeTEx the followong VDV Recommendations have been published:
VDV-Recommendation 462 - "German Profile for NeTEx"
Standardised exchange of line network and timetable data with the European standard CEN-TS 16441 ‘NeTEx’
This VDV Recommendation 462 specifies the implementation of the CEN-NeTEx standard. It describes the specific implementations for dedicated applications and thus reduces the number of models and representations possible in NeTEx, significantly simplifying the application of NeTEx for concrete implementations.
VDV Standard Interface: Route Network / Timetable
VDV-Recommendation 452 has been a major input to Transmodel as well as to NeTEx. It is widely used in the German speaking countries, but also in other regions of the world. Work on this standard started in the early 1990's. Many updated versions have been published since then.