A catalog is a collection of project-independent items like catalog sections, item layouts, price names, extra prices, and catalog items. The catalogs are basically of two types, normal catalog and extra price catalog.
Extra price catalog is a special kind of catalog that identifies specific attributes describing deviations with respect to what is listed in catalog layout and item layout.
This section describes how to create catalogs and how to define catalog data. The picture below shows major steps required for Catalog Data creation: