AIF value substitution maps

By creating value substitution mapping, you can define how values are replaced when data is processed in a pipeline. Each lookup table(substitution map) can act on only one data type. For example, for the ExternalItemId data type, you can create entries that replace several part numbers with part account numbers.

Goto System administration > Setup > Services and Application Integration Framework and open Value substitution maps.

Each entry in a lookup table defines a relationship between an internal value and an external value. The way that values are substituted depends on the direction of the document transfer.

For inbound transfers, the value that you enter in the Internal value field replaces the value that you enter in the External value field.
For outbound transfers, the value that you enter in the External value field replaces the value that you enter in the Internal value field.

Cheers! :)