For more information about SIRI, including FAQ, guidelines and Training Materials, please refer to the DATA4PT Knowledge Database
http://cen.eu/
link
http://itsstandards.eu/
https://www.vdv.de/siri.aspx
http://netex-cen.eu/
https://groups.google.com/g/siri-developers
https://www.vdv.de/siri-contributors.aspx
http://www.transmodel-cen.eu/