These software applications can be in the form of customer relationship management (CRM), enterprise resource planning (ERP), supply chain management (SCM), and other systems.

For an organization that has implemented enterprise resource planning (erp), the application can directly connect to the service interface, generate the appropriate XML data, and invoke the service.

I have experienced a case where the price for a shopping cart item was calculated in an Enterprise Resource Planning (erp) system, item by item.