Data Transformation Engine Design Studio Tutorial

Chapter 19 - Incrementing Output Data Using the INDEX Function
Design Studio Tutorial
287
The File Output Data group type contains the PO group type, whose components
are the Header and the Detail group type (whose components are the fields in
the output file):
Using the INDEX Function
The ExecutableUsingINDEX map uses INDEX function to index the output.
On the OutputFile output card, the map rule for the PO group type calls the
MakePO functional map.
The map rule uses the
CHOOSE function for the details, the INDEX function for the
header records, and the
INDEX function for the current purchase order (indicated
with the shorthand notation of
$).