[2] The EDIFACT standard provides: The work of maintenance and further development of this standard is done through the United Nations Centre for Trade Facilitation and Electronic Business (UN/CEFACT) under the UN Economic Commission for Europe, in the Finance Domain working group UN CEFACT TBG5.
See below for an example of an EDIFACT message used to answer a flight ticket (FRA-JFK-MIA) availability request: The UNA segment is optional.
Trailing empty (or null) data elements and their leading separators are omitted to reduce message size.
The optional nature of the UNA segment and the initial choice of the comma (",") as the default decimal mark provide a source of common confusion.
This code specifies that the message name and version is PAORES 93 revision 1 and it was defined by the organisation IA (IATA).