.EVENT.......: Acquire_Copy
.DESCRIPTION.:
The library acquires a copy of an item.
This event represents the acquisition of a single copy.
Note, though, that for popular items, the library may acquire multiple
copies at the same time, with the same purchase order.
.COMPOSITION.:
item_id &item_id
copy_id ©_id
;[endpk]
acquisition_date &date
.BackwardReferences:
see CLASS Copy