The "Functional Requirements for Bibliographic Records" (FRBR) is a conceptual model that outlines how bibliographic information should be organized and accessed. It aims to improve the way users find, identify, select, and obtain information resources, such as books, articles, and other materials. FRBR categorizes these resources into four main entities: Work, Expression, Manifestation, and Item. FRBR emphasizes the relationships between these entities, helping users understand how different versions or formats of a resource relate to one another. By providing a structured framework, FRBR enhances the effectiveness of library catalogs and information systems, making it easier for users to navigate and discover relevant resources.