Reprise: Unit Codes (EUC)
EDCS Version 2.7
- Enumerated (SE_UNITS_ENUM)
- Extended from FACC
- English, and non-standard, units included
- Some composition rules but not rigorous
- Unstructured enumeration; limited or no definitions; e.g.:
- EDCS_UNITS_CENTIMETER /* Length (10^-2 Meters) */
- EDCS_UNITS_DEGREE_CELSIUS /* Temperature */
- EDCS_UNITS_GRAM /* Mass (10^-3 Kg) */
EDCS Version 3.0
- Numeric encoded (positive, non-zero)
- Strictly compliant with SI (e.g., separate unit and scale)
- Additional “dimensional formula” to better capture semantics
- Coding style is label-based, with definitions, e.g.:
- 61 METRE “SI base unit for length.”
- 25 DEGREE_CELSIUS “The degree Celsius is a special name for the degree kelvin for use in stating values of Celsius temperature. t = T - T0 where T0= 273,15 K.”