Users today frequently encounter audiovisual (AV) resources as a type of non-book material due to their prevalence and diversity. Their specific characteristics require a detailed bibliographic description that enables users to find, identify, select, and access the appropriate resource. The master's thesis thoroughly presents and compares the bibliographic descriptions of AV materials based on two standards, ISBD(NBM) and the Consolidated Edition of ISBD. We have prepared bibliographic descriptions according to ISBD(NBM) and the Consolidated Edition. Through a comparative analysis, we reviewed elements across all areas, looked for differences, and highlighted changes introduced with the Consolidated Edition. With a focus on the bibliographic description according to the Consolidated Edition, we tested through examples of various types of AV resources whether the Consolidated Edition ensures compliance with the goals and functions of the catalog, as defined in the Statement of International Cataloguing Principles. We found that the Consolidated Edition anticipates a bibliographic description with a more meaningful sequence of elements. By introducing specifications for content form and media type in the new area 0, it more precisely defines and dissects the AV resource, which enables easier identification and selection of materials by the user, thus ensuring compliance with the functions of the catalog. The general material designation according to ISBD(NBM) proved to be inadequate upon comparison.
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