Data Transformation Engine Design Studio Tutorial

Chapter 2 - Modifying the Contact Type Tree Components of Contact
Design Studio Tutorial
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Components of Contact
The Contact group window defines the components of the Contact input data.
The components of the Contact group type define the data objects for the contact
records in the order they appear in the data stream.
In the Contact group window composition hierarchy shown below, there is not a
data definition for the Middle Name Field.
Classification Hierarchy
The classification hierarchy shown in the Contact.mtt type tree window illustrates
that the First and Last item types are subtypes of Name. The Name item type is
a subtype of the Field item type. We could also express this classification
hierarchy by saying that First Name and Last Name are subtypes of Field. Two
type names separated by a space, such as First Name, indicate a classification
subtype relationship.