Updates and Reminders
Genre headings: Subdivisions
Do not add subdivisions to 655s, not even geographical. If you import from OCLC, delete them in Midcat. You may notice that Midcat currently has lots of genre headings with subdivisions -- perhaps this can be a cleanup project later (but probably not a priority).
Here's the info from a Genre FAQ (which is now on the Wiki):
Q30: Is subdivision of genre/form headings permitted?
A: There is currently no provision for the subdivision of LC genre/form headings, either topically, chronologically, geographically, or by form. The MARC authority and bibliographic formats permit it, but LC has chosen not to implement the subfields at this time.
Updated Q31: Why can’t the moving image genre/form headings be subdivided geographically?
A: Whether geographic subdivision of moving image genre/form headings should be permitted has been an ongoing debate, and there are valid arguments on each side. The argument against geographic subdivision is mostly a philosophical one: geography is not part of the genre or the form of a work. A horror film is a horror film whether it is produced in France or in the United States.
There are also practical arguments against geographic subdivision. bibliographic formats permit it, but LC has chosen not to implement the subfields at this time.
From this LC document (pdf)