Chapter 8 Building Data Transformation Diagrams
A parameter is an input or output variable global to a transformation task that you can use to customize your data transformations. A parameter is available to all diagrams within a given task. For example, if you manipulate sales figures, you might require a parameter specifying the sales region you are interested in.
Parameters are used in the source expression of data structure columns (see Data Structure Columns (ILM)).
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