The sales and procurement-processes from the vendor point of view. The model makes some assumptions about functions for inventory, sales, order and product management being provided by an ERP-system. In the real world, these might be provided by different systems and might be structured differently, however, this set of functions is probably required for providing the e-procurement services and the price/sales aggregated reporting services. For the usage of these services, please see the views for "analysis" and "procurement". Standardized interfaces is the key to acquire more details on the business transactions such as product information and other measurable details.