Overview of the SAP Retail POS Interface
IS-POS provides intermediate document (IDoc) types that support retail processes between a central SAP retail system and local in-store point-of-sale (POS) systems. Converters handle communication between the head office and the store and convert IDocs into the correct formats for POS systems. Complementary POS systems usually need to interface with a middleware converter certified by SAP. POS vendors can have their software certified in conjunction with the use of middleware converters.