The Transformer stage is a processing stage. It appears under the processing category in the tool palette. Transformer stages allow you to create transformations to apply to your data. These transformations can be simple or complex and can be applied to individual columns in your data. Transformations are specified using a set of functions.
Example:-
![Shows a Transformer stage taking input from a Data Set stage, and outputting to two other data sets.](http://pic.dhe.ibm.com/infocenter/iisinfsv/v8r5/topic/com.ibm.swg.im.iis.ds.parjob.dev.doc/images/ss11_1.gif)
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