The Functional Requirements for Bibliographic Records (FRBR 1998), developed by the International Federation of Library Associations, is an entity-relationship model of the "bibliographic universe". A sophisticated frameworks for conceptualizing intellectual content and its carriers FRBR has been extremely influential within the library community, and, increasingly, within the wider world of ontologies for content management. We analyzes several points of mismatch between FRBR's formal model and some characteristic explications of the FRBR view, arguing that these show that our understanding goes beyond the model in ways that are natural, but can be confusing. The FRBR Group 1 entities are defined as follows: Work: "a distinct intellectual or artistic creation"; Expression: "the intellectual or artistic realization of a work in the form of alphanumeric, musical, or choreographic notation, sound, image, object, movement, etc., or any combination of such forms" (an English synonym might be "text"); Manifestation: "the physical embodiment of an expression of a work", {edition is a rough synonym); Item: "a single exemplar of a manifestation", (a physical copy).
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