EN
The article discusses basic standard for bibliographic data being used in libraries – the MARC21 format. Presents main goals and assumptions of its development, as well as conditions influencing its application, advantages and disadvantages. Currently there is a need to record bibliographic data in a form better adapted to modern technology. Though different efforts are being made to change this format or to develop a completely new standard. The author discusses several potential scenarios and their consequences, to present the complexity of discussed problem.