Hi!
I would have thought that the correct approach would
be to encode these
values as gYear, and just record the four-digit year.
While we do have a ticket for that
(
https://phabricator.wikimedia.org/T92009) it's not that simple since
many triple stores consider dateTime and gYear to be completely
different types and as such some queries between them would not work.
--
Stas Malyshev
smalyshev(a)wikimedia.org