Configure Key Fields for Multi-Detail Headers
About this task
In extended mode, you must identify multi-detail headers with key fields. You must also specify key fields if there is any possibility of ambiguity in the data (for example, if a multi-detail in the CII file layout has no corresponding data).
Note: Key fields are intended to be used with string fields
only. If you use a key field on a numeric field, the result is not
guaranteed.
To configure a key field for a multi-detail header: