nIn FRBR, expressions can have
multiple manifestations; in Variations2 instantiations are unique to a
container.This is a practical consideration:too difficult and time-consuming to identify identical
nVariations2 containers are
less abstract than FRBR manifestations, containing some amount of item-level descriptors.
nFRBR items are copies in a
collection; Variations2 media objects are digitizations.
two differences result from Variations2 focusing exclusively on digital content.FRBR did not have this focus.