The root element that identifies the request business document has the same name as the corresponding function module. It contains the namespace reference of business documents that refer to RFCs ("urn:sap-com:document:sap:business:rfc").

Import parameters of the RFC appear as sub-elements of the root element. These sub-elements have the same name as the parameters as they are defined in the function module interface. Within these elements, the SAP-internal data structures are represented in a serialized form in accordance with the specification Serialization of ABAP Data in XML.

Because it is not possible to distinguish tables in the function module interface in import tables and export tables, all tables that should be taken into account have to be represented as sub-elements.