A function is a procedure built within Transformer’s graphical user interface, which produces the required output based on calculation upon, or manipulation of, input data. You can apply functions to produce the output value for a specific node using the Output Node Mapping Builder.

In addition to the set of predefined functions discussed in Using Functions, Transformer enables you to implement your own custom function procedures in Java according to the format specified in this chapter.

The custom functions can be easily plugged into your graphical Transformer interface and be available for use in your transformations at run or design time.