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You can rename, add comments, or specify links to business documentation for a mapping at any time. Adding comments or business documentation links is an easy way to document the purpose of a mapping. The Repository Manager and MX views include these comments to help you analyze the metadata.
To rename or add comments to a mapping:
Open a mapping in the Mapping Designer and click Mappings > Edit.
In the Edit Mapping dialog box, enter a new name for the mapping.
Add a description of the mapping in the comments box.