SIUnit
The SIUnit class can define quantities in the terms of the SI-Unit-System by specifying the corresponding SI prefix (optional) and a SI unit name. The usage of SI units must be the preferred way of expressing units, since these units can be easily translated into other SI units.
General Information
| Attribute | Value |
|---|---|
| Owner | physical_information |
| Applied Stereotype | |
| Base Classifier | Unit |
| Is Abstract | false |
| Derived Classifiers |
Attributes
| Name | Type | Mult. | Description | Owning Classifier |
|---|---|---|---|---|
| exponent | Integer | 0..1 | Defines the exponent with which this unit instance should be used. In order to define square meters for example, the SIUnit "metre" with an exponent of 2 will be used. If no exponent is defined it is equivalent to the value 1. | Unit |
| unEceCode | String | 0..1 | The UNECE provides a list of "Codes for Units of Measurement used in the International Trade". This attribute shall be used for traceability of Units defined in the VEC into the UNECE system only. It provides additional meta information about the unit, but shall not be used as the only definition of a Unit. Specifying a UNECE code does not exempt the creating system from generating a correct VEC mapping of the corresponding unit. In case of doubt, the VEC mapping has priority. | Unit |
| siUnitName | SiUnitName | 1 | Specifies the name of SI unit (e.g. metre, second,…) | SIUnit |
| siPrefix | SiPrefix | 0..1 | Specifies the prefix of the SI unit (e.g. milli, centi, mirco,…) | SIUnit |