Item Associations can be specified at runtime via Application Interface messages.
The message will provide the child item type and the region ID where that item is the:
Next item to exit the region
and
Item ID of a parent item
(serialized item) the child
(serialized or non-serialized item) is
to be associated with.
Serialized Items may not be child
members of an association.
Warning: The association of a non-serialized item to
a serialized parent item can become corrupted or lost in the
following three ways.
If a sequence error is detected
for a non-serialized item in a region where the item has an
associated parent Item.
If a non-serialized Item crosses a
PRT service boundary and the PRT process for the first service is
unable to provide the parent item data for the non-serialized
item.
A non-serialized item has an
associated parent item and the non-serialized item is placed on an
item carrier with another item of the same item type.
PRT has no way of re-associating the Items when an association is lost except through a manual user transaction.
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1. Items: defined. |
