Building an Eclipse product using PDE is centered around a product configuration, a .product file. This file manages all aspects of a product definition from its constituent plug-ins to configuration files to branding.
The product configuration is entirely managed by PDE to simplify Eclipse product development. Its format is internal and is not intended to be read by tools other than PDE.
PDE provides a form-based multi-page editor to manage the product configuration.
For details on the Product Configuation Editor, refer to the following documents: