.EVENT.......: Dispose_Copy
.DESCRIPTION.:
A copy of an item is disposed of, so that the library no longer stocks
that particular copy.
A copy may be disposed of if it is too worn or damaged to be worth
repairing. Or perhaps very few loans of a particular item are being
made, and the librarian decides to dispose of some or all of the copies
in order to free up shelf space for other more active items.
.COMPOSITION.:
item_id &item_id
copy_id ©_id
.BackwardReferences:
see CLASS Copy