The following are data structures that are in UN/EDIFACT:
Data Element. The smallest structure of the standard that defines the nature
of the data.
Composite Element.
A collection of Data Elements that together provide a semantic
meaning as a whole.
Data Segment. The building blocks of an EDI document. Consists of a
collection of Data Elements and/or Composite Elements.
Message. A pre-defined set of
Data Segments that describes how the data
of a business transaction is laid out.
Group.
An optional pair of Data Segments that envelope one or more
Messages. The Group normally provides information about
inter-departmental flow of the EDI document.
Interchange.
A pair of Data Segments that envelope one or more Groups.
The Interchange normally provides general information about the
inter-company transmission of the EDI document.
Package. An optional
pair of Data Segments that envelope binary data.
