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## Defining Transformations

For basic information about transformations see Chapter 40, Transformations.

Here we will explain how you should create transformations that change the data flowing through some components.

For brief table overview of transformations see Transformations Overview.

Below we can learn the following:

1. What components allow transformations.

   Components Allowing Transformation

2. What language can be used to write transformations.

   Java or CTL

3. Whether definition can be internal or external.

   Internal or External Definition

4. What the return values of transformations are.

   Return Values of Transformations

5. What can be done when error occurs.

   Error Actions and Error Log (deprecated since 3.0)

6. The Transform editor and how to work with it.

   Transform Editor

7. What interfaces are common for many of the transformation-allowing components.

   Common Java Interfaces

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