TomT0m added a comment.
Another option : specify a class of exceptions. A property « exception class »
If an item is an instance of the execption class, then the constraint is not
relevant.
In spirit, if we require for example items with a birth date to have a death
date, and if we have a subclass of « fiction human », say « immortal », that
should actually not have one
birth date :
constraint : requires statement
property : death date
exception class : immortal
Which reads in english « any item with a birth date should have a death date
except immortal instances »
TASK DETAIL
https://phabricator.wikimedia.org/T169374
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To: TomT0m
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