With the advance of digital technology and consequently with the appearance of new media, serial publications subject has achieved previously unforeseen possibilities.
The article addresses the issue of the cataloguing rules used in Slovenia within the COBISS shared cataloguing system. The outdated cataloguing codes (PPIAK, AIK), and undocumented updates, modifications, and cataloguing practice from the last 14 years have created in the time of high-speed technological changes more and more difficulties in the development and operation of the COBISS system.
