In my field we run in to this problem all the time. We may know
the year an object was manufactured, put into service or modified; but we
frequently do not know the month or the day.
Can your system be modified to accept a pair of zeros in the day
subfield -- or in both the month and day subfield -- when the information
is not known, i.e., 1895-06-00 or 1895-00-00?
--
Ken Heard
Consultant Museologist
Coordinator
Technology and Transport Museums Sector
Canadian Museums Association
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