For the manifestation, the “manifestation identifier” that is listed is most commonly the ISBN. This is an important data element, but I do wonder how often users (including library staff) approach the library catalog with an ISBN in hand (or head). The ISBN is, however, heavily utilized in automated processes, such as duplicate detection and retrieval of cover images from online sources. Because there is no definition of users in the document, it is not possible to know whom the group had in mind for the various data elements, nor can we know if some bibliographic attributes were specifically intended for automated processing.
The statement of responsibility is among the elements that have a moderate role for “find a manifestation.” This is not a heading in library data, and I am confused by the assumptions the FRBR Study Group makes regarding the action of “finding.” In fact, the report does not mention indexing, nor whether there is even an assumption that there are headings. Yet the find action does imply that some ability to search must exist, and the Final Report describes the elements of moderate value for find as those “typically used as a secondary search term.” It isn’t clear what “secondary search term” means, but presumably this is a term that can be used to limit results, as with the use of limiting elements in many catalogs by language, resource type, or other characteristic. The Study Group clearly harbored some implicit assumptions about system capabilities, but what these are is not made clear.