C.4 IEC CDD syntax reference
| Type | Dictionary |
| Coverage | A registry for metadata used for classification and description of products in all industrial/technical domains. |
| Hosted by | International Electrotechnical Commission (IEC) |
| Homepage | https://cdd.iec.ch/ |
The IEC Common Data Dictionary (CDD) is a registry for metadata used for classification and description of products in all industrial/technical domains.
The data model is described in IEC 61360. The dictionary includes quantities and units that are described in IEC 62720 - Identification of units of measurement for computer-based processing.
It covers any standard or non-standard units of measure currently in use, in two or more distinct ethno-linguistic groups or nations, at least in one domain of industry, for which an explicit method of conversion to a known standard unit of measure or its equivalent is well documented or evident from external references.
Quantity examples:
| IRDI | Symbol | Name |
|---|---|---|
| 0112/2///62720#UAD002#001 | --- | acceleration |
| 0112/2///62720#UAD107#001 | --- | mass flow rate |
Unit examples:
| IRDI | Symbol | Name |
|---|---|---|
| 0112/2///62720#UAB044#001 | in/s2 | inch per second squared |
| 0112/2///62720#UAA497#001 | g/s | gram per second |