Data Transformation Engine Type Designer Reference Guide

Chapter 1 - Introduction Type Designer Files
Subtypes
Subtypes are created for a number of reasons like identifying distinct data object.
Another reason is that specific types of an object may have different properties
such as different date formats.
Think of subtypes as different "flavors". Ice cream flavors can be chocolate,
strawberry, or vanilla. To create a type tree to represent ice cream as data, the
different flavors of ice cream could be subtypes of the type IceCream.
The type IceCream is generic and describes any kind of ice cream. The type
Chocolate, a subtype of IceCream, represents a certain kind of ice cream:
chocolate.
A file of purchase order data may have two different kinds of records: header and
detail. The type tree representing this data might have a Record type with Detail
and Header as subtypes of Record.
Type Designer Files
Type trees have the .mtt file name extension. If the Backup on save option is
enabled, the backup type trees are automatically created when the type tree is
saved. The backup type trees have the .bak file name extension. The backup type
trees are automatically saved in the same directory as the type trees.
When a type tree is analyzed, a type tree analysis message file is automatically
created in the same directory as the type tree. The type tree analysis message
files have the .dbe file name extension.
The following are the Type Designer file name extensions.
Extension File type
.mtt Type tree file
.dbe Type tree analysis message file