--- Comment #1 from Marcel de Rooy <[hidden email]> ---
(In reply to mathieu saby from comment #0)
> In C4:Biblio::TransformMarcToKoha, publicationyear and copyrightdate are
> filled from MARC dates.
> MARC dates could be uncertain. like "200X", "2012?", "ca. 2012".
> If there is a "X" or a blank, the date is not copied in database.
> Maybe this could be fixed. But in that case, publicationyear and
> copyrightdate will sometimes contain non numerical data. Maybe that's an
> Sometime MARC dates are a range, like "2010-2013". In that case, Koha is
> currently using only the first one. Why not both?
I would feel for saving 18.. or 18XX etc. to 1800. Or 197X to 1970. Etc.
We cannot save two dates in one field obviously. So we have to choose and pick
the first one.
> Last remark : In UNIMARC, I don't know the difference between
> publicationyear and copyrightdate. Is it obvious for MARC21 people ?
In Koha the UNIMARC side uses publicationyear and MARC21 uses copyrightdate.