What is catalog mapping?
You can map categories of different catalogs to the reporting categories in other catalogs by using the Manage Catalog Mapping task in the Setup and Maintenance work area. You can map one or more categories within a catalog to category in a second catalog.
For example, suppose that you want to roll up the costs associated with all items assigned to a set of categories in catalog. Catalog mapping lets you select a category in a catalog and map all the categories in the set to that category.