The Contracting Authority intends to acquire the software maintenance and modification services of the Public Transport Travel Data Information System (hereinafter referred to as IS "Vintra").

IS Vintra software maintenance and modification services include:

1. IS Vintra Software Maintenance Service is a service that includes the elimination and improvement of malfunctions in is Vintra software and databases without changing the operation of existing software and databases and is provided if there is a need for this service.

2. IS Vintra software modification service is a service that includes making changes to IS Vintra software and databases and creating new functionalities.

A detailed description of the object of purchase is given in the "Technical Specification of IS Vintra Software Maintenance and Modification Services".