Data Transformation Engine Design Studio Tutorial

Chapter 2 - Modifying the Contact Type Tree Adding Components to Group Types
Design Studio Tutorial
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Component rule bar
2 From the Component menu, choose Set Range.
The Set Range dialog box appears with the default component range of (1:1).
3 In the Min field, enter 0.
4 Click OK.
The optional component range of (0:1) appears next to Middle Name Field.