[Koha-bugs] [Bug 27730] Innocent changes to framework silently delete bibliographic data

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27730

--- Comment #5 from Ian Bays <ian.bays at ptfs-europe.com> ---
As yourself I had assumed that "ignore" would leave the data intact, so I
initially thought it would be "best" if the data is preserved but it is just
not pulled out for display.

Because we understand it may take time to agree and implement we set about
scripting changes to our frameworks to set all those that say "ignore" to a
real tab but to set "hidden" to a value that hides it.

However we discovered that the default framework has circa 13 subfields set to
ignore including 999$a, $b and $c.  If you set these to other than ignore the
framework check fails.

We have an amended script that reinstates the real tab number for all set to
"ignore" except the 999 subfields.  The script also copies tags and subfields
from default where they had been deleted (or possibly not updated from the
delivered defaults).

Many people will never notice losing these bits of data as they don't see them,
but if you've got your data from a rich source and save in a different
framework you would not expect the rich data to be removed.

A warning (if you are changing to a framework that will lose data for this
record) might be a good first step until there is consensus on how to deal with
it.

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