![]() |
Copyright © TIBCO Software Inc. All Rights Reserved |
• The interchange is the basic unit of electronic data transfer. It contains at least one functional group or one message and is started by either a service string advice (UNA segment) or by an interchange header (UNB segment). The interchange is identified by the interchange header and terminated by an interchange trailer (UNZ segment).Figure 1 depicts the structure of an interchange structure.Figure 1 Interchange StructureSegments starting with UN are called service segments. They constitute the envelope which groups the EDIFACT messages.The following example of an EDIFACT interchange contains a BANSTA (Banking Status) message:
A functional group begins with a functional group header (UNG segment), which contains internal routing identifiers, and ends with a functional group trailer (UNE segment).The entire EDIFACT message structure is bounded by a UNH header segment and a UNT trailer segment. The user data segments of a message are organized into the following three sections:
• Header section Contains information that applies to the whole message.
• Detail section Contains information that may be repeated and provides the details for the business function of the message.
• Summary section Contains summary information for the message such as an invoice total amount.
![]() |
Copyright © TIBCO Software Inc. All Rights Reserved |