UNA service string
The UNA type is an optional envelope control. It is used to specify syntax objects that appear within the EDIFACT interchange.
The following are the components of the UNA type:
| Component | Description |
|---|---|
| Composite Delimiter | A delimiter between components of a composite. |
| Element Delimiter | A delimiter between elements in an envelope or segment. |
| Decimal Delimiter | A separator between the integer and fractional part of EDIFACT decimal numbers. |
| ReleaseCharacter | A character used a release character. |
| Reserved Delimiter | Reserved for future use. |
| Terminator Delimiter | A terminator of an envelope or segment. |
The Composite, Element, ReleaseCharacter and Terminator Delimiter types are all specified as syntax items. If a UNA appears in the data, the values that occur in the UNA set the active syntax values. If there is no UNA, the release character is assumed to be a question mark ? and the delimiter values are set to the values in the UNB.