This is modified version of VDV301 for usage in Czech Republic, especially for Prague Integrated Transport. Its development is in beta stage at the moment, created to satisfy contemporary needs of PID, ready to accept new propositions. All the changes are to be slowly proposed and merged into official/mainline VDV301. The documentation is available in Czech at the moment.
- https://www.vdv.de - Verband Deutscher Verkehrsunternehmen e.V. (VDV)
- https://www.vdv.de/ip-kom-oev.aspx - Internet Protokoll basierte Kommunikationsdienste im ÖV (IP-KOM-ÖV)
- https://forum.vdv.de - Bulletin board for companies and other parties interested in VDV 301