When you create a parameter for a transformation, a logical data object, a mapplet, a mapping, or a workflow, the parameter applies to that object. For example, you can create a parameter in a Read transformation to parameterize the columns that the transformation reads from a data source. Or, you can create a mapping parameter that defines the run-time environment.

You can create parameters for the following objects:

Transformations or data objects
Logical data objects
Mapplets
Mappings
Workflows

You can set workflow parameter values and mapping parameter values at run time by configuring the parameter values in a parameter set or a parameter file.

You can create parameters at the same time that you assign parameters to fields and properties. When you assign a parameter to a field, you can create the parameter to use. You can also browse for a parameter that you created previously.

Maintain user-defined parameters on the

Parameters

tab of a transformation or of a data object. A mapping, mapplet, workflow, or logical data object also has a

Parameters

tab. You can add, change, and delete parameters on the

Parameters

tab.

You can also access parameters directly from the Outline view, which shows where parameters are used, defined, and bound. When you click on a parameter in the Outline view, the parameter properties appear on the

Parameters

tab.