We are interested in how approximate dates can be represented in DC
metadata. In libraries it sometimes arises that the year of publication
of an item is not known, but the decade is, and the AACR2 standard is to
use a hyphen to represent the unknown year: e.g. 199-. There are other
AACR2 standard representations for unclear dates: e.g. 1996?, 198-?,
etc.
We have not been able to identify other standards that allow for unclear
dates, so I guess that for these records we would give the SCHEME as
AACR2.
Greg Robinson
Senior Systems Librarian
Tasmania Online
State Library of Tasmania
Phone 03 6233 7632
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