The Retail business function merely contains the function that configures SAP ERP as SAP Retail. It is automatically activated with the business function set SAP Retail.
In contrast to other industry solutions, SAP Retail is developed entirely in the SAP Enterprise Core Components (SAP ECC). The business function set SAP Retail is used only for activating this retail solution. For this reason, the business function Retail does not entail any retail-specific functions.
As part of SAP ECC, innovations for SAP Retail are supplied in enhancement packages via enterprise business functions. Retail-specific enterprise business functions have the prefix "ISR".