Functional Requirements for Bibliographic Records

Functional Requirements for Bibliographic Records (FRBR /ˈfɜːrbər/) is a conceptual entity–relationship model developed by the International Federation of Library Associations and Institutions (IFLA) that relates user tasks of retrieval and access in online library catalogues and bibliographic databases from a user’s perspective.

[4] Despite initial positive assessments of FRBR clarifying the thoughts around the conceptual underpinnings of works, there has been later disagreement about what the Group 1 entities actually mean.

"Relationships serve as the vehicle for depicting the link between one entity and another, and thus as the means of assisting the user to ‘navigate’ the universe that is represented in a bibliography, catalogue, or bibliographic database.

Examples include reproductions such as copies, issues, facsimiles and reprints, photocopies, and microfilms.

Descriptive relationships also includes annotated editions, casebooks, commentaries, and critiques of an existing work.