[Koha-devel] problem with mandatory subfields

[Ambrose Li [CCCGT]]

Hi,

I discovered one problem while I am trying to enter one record
from our OPAC.

Right now, 100c is mandatory. This is not correct. (See the
examples at http://lcweb.loc.gov/marc/bibliographic/ecbdmain.html;
I think 100a is mandatory, not 100c.) But assuming that 100c
really is mandatory, it would really only mean that one of 100c,
110c or 111c is mandatory, since any of 100, 110, or 111 can be
the main entry.

Is it currently possible to specify that one of several subfields
is mandatory? Or is this something that cannot yet be specified?

-- 
Ambrose Li
Chinese Cultural Centre of Greater Toronto | http://www.cccgt.org/