To supply custom file names as input parameters to the mapping, do the following:
1.Add an Input component to the mapping (On the Function menu, click Insert Input). For more information about such components, see Simple Input.
2.Click the File ( ) or File/String ( ) button of the source component and select Use Dynamic File Names Supplied by Mapping.
3.Connect the Input component to the root node of the component which acts as mapping source.
For a worked example, see Example: Using File Names as Mapping Parameters.