You create an outbound mapping service to translate an outbound, back‐end, proprietary business document (for example, an IDOC from an SAP R/3 system) to a Chem eStandards payload. Elements of the proprietary business document need to be mapped to corresponding elements in a specific version of a Chem eStandards payload. The requirement is to map values to all elements in the Chem eStandards payload; extra elements in the back‐end business document are ignored.