C.3 UNECE syntax reference
| Type | Dictionary |
| Coverage | A single list of code elements for units of measure for use worldwide in administration, commerce, transport, science and technology. |
| Hosted by | The United Nations, through its Centre for Trade Facilitation and Electronic Business (UN/CEFACT). |
| Homepage | https://www.unece.org/cefact/ |
The United Nations Economic Commission for Europe through its UN Centre for Trade Facilitation and Electronic Business (https://www.unece.org/cefact/), develops, maintains and publishes for free of charge a number of code lists.
Recommendation 20 provides three character alphabetic and alphanumeric codes for representing units of measurement for length, area, volume/capacity, mass (weight), time, and other quantities used in international trade. The codes are intended for use in manual and/or automated systems for the exchange of information in administration, commerce, transport, science and technology.
The code list (see https://unece.org/trade/cefact/UNLOCODE-Download) is presented in three separate annexes:
Annex I – Code elements listed by quantity category;
Annex II – Code elements listed by unit of measure name; and
Annex III – Code elements listed by common code.
See 5.6.4.4 how this information is mapped to Properties of DataType EUInformation.
Unit examples:
| UNECE code | Symbol | Name |
|---|---|---|
| MTR | m | metre |
| CMT | cm | centimetre |
| NMI | n mile | nautical mile |
| A11 | Å | angstrom |
| F50 | µm/K | micrometre per kelvin |
| AK | fth | fathom |
| INH | in | inch |
| L98 | yd/°F | yard per degree Fahrenheit |
| MTK | M2 | square metre |
| ACR | acre | acre |
| MTQ | M3 | cubic metre |
| LTR | l | litre |