When you design and configure a Data Transformation service, you can use a large number of built-in script components. You can also program custom components, such as document processors or transformers, and insert them into a script. When you export the Data Processor transformation as a Data Transformation service, the service runs the custom components.

You can implement the custom components in Java, C, or C++. This chapter provides programming and configuration guidelines. For more information about the interfaces that you must implement, see the

External-Component Java Interface Reference

or the

External-Component C and C++ Interface Reference

.