There are two types of mapping services: inbound and outbound. Create an inbound mapping service to map a RosettaNet PIP document received from a trading partner into the format used by your internal (back-end) system. Create an outbound mapping service to map a business document generated by your internal system into a RosettaNet PIP document that you can send to a trading partner. For more information on mapping business documents, see Mapping a RosettaNet PIP Document.