A button to delete (non-mandatory) subfields and fields
is added to the bib and authority MARC editors. This button,
which displays as a hypen or minus sign after the plus sign
to clone a field, acts as follows:
[1] When deleting a whole MARC field, if at least
one other repeat of that field exists, deletes
the field from the editor page. If the field
to be deleted is the last instance of that tag,
the contents of the field are cleared, not removed.
This allows one to delete all 650 tags, then
add a new one without having to reload the
record in the editor.
[2] When deleting a subfield, if at least one other
repeat of that subfield and its tag occurs
*anywhere else in the record, not necessarily in the same tag*,
deletes the subfield.
Otherwise, if the subfield is the last occurrence
of that tag/subfield combination, clears the input
form instead.
Documentation note: new screenshots for MARC editor, plus
description of the '-' button.
Credit to MJ Ray for introducing the '-' button
and the UnCloneField JavaScript function.
Signed-off-by: Andrew Moore <andrew.moore@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>
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