Data Transformation Engine Design Studio Tutorial

Chapter 12 - Mapping Optional Inputs Using the Map Designer
Design Studio Tutorial
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The input for Master is the Sts.txt file, described in the type tree by the
UnitedStates Input Data type. Name the input card USData.
To generate each StatePop in the output, create the F_MapState functional
map. The map rule to generate the StatePop group type specifies two input data
objects: State and Population.
Generate StateID only if StateID data is present in the input data. Generate
Population output data only if Population Statisitic is present in the input data.
The map rule for the StatePop is:
=F_MapState ( StateID:State:Region:USData , Population
Statistic:Human:State:Region:USData )