Using the Workflow Manager Screen – Advanced - Learning Informatica PowerCenter 9.x - page 248

Defining mapping-level variables
As mentioned earlier, you can define variables for the hardcoded values in the mapping in-
side transformations as well. You need to define parameters or variables under Mapping
before you can use them in transformations, otherwise the mapping will become invalid. To
add the value, perform the following steps:
1. Open the mapping for which you wish to add variables in Mapping Designer, and
navigate to Mappings | Parameters and Variables .
2. In the next screen, click on Add a new variable to this table . Define the variable
as select the type as Parameter and Variable based on your requirement. Now,
click on OK .