FRBR: Functional Requirements of Bibliographic Records

The 1998 revolution, first of several related "FR" conceptual models

FRBRer , entity-relationship
FRBRoo, object-oriented
FRAD , authority data
FRSAD, subject authority data

Extremely clear with music

Work, as conceived by the composer
Expression, three entities:
   Notated music presentation
   Performance
   Arrangement
Manifestation: each publication
Item: the single copy

Other concepts

Related work
   Paraphrases
   Adaptations, derived works

Impact on catalogues

Very slow, but now more and more effective