As has been observed by the IFLA FRBR review group, one area that has led to much discussion is the meaning of the group 1 entity expression1). This is also true for the working group preparing the CEN cinematographic works standard. Currently, there are two positions with respect to the expression entity:
A cinematographic work is inseparable from its primary cinematographic expression. A distinction between these cannot be reasonably modelled in information systems.
A cinematographic work can have multiple expressions and should be modelled accordingly.
Some perspectives on this issue can be found in the following sources:
Martha M. Yee:
Understanding FRBR. Chapter 11, FRBR and Moving Image Materials: Content (Work and Expression) versus Carrier (Manifestation) (2007). FRBR and Moving Image Materials: What It Is and How It Will Affect Our Retrieval Tools. 1, pp. 117-130.
http://repositories.cdlib.org/postprints/2648
Also on this wiki: