IfcSIUnitName

BACnet MVD

#### IfcSIUnitName

Natural language names

| SI Einheit - Bezeichnung
| SIUnit Name
| Nom d'unité du système international

##### Semantic definitions at the type

Type definition

> NOTE Definition according to ISO/CD 10303-41:1992
> An SI unit name is the name of an SI unit. The definitions of the names of SI units are specified in ISO 1000 (clause 2).

> NOTE Type adapted from si_unit_name defined in ISO 10303-41.

> HISTORY New entity in IFC1.5.1.

Enumeration definition

Constant | Description
--- | ---
AMPERE | Unit for electric current.
BECQUEREL | Unit for radioactivity.
CANDELA | Unit for luminousintensity.
COULOMB | Unit for electric charge.
CUBIC_METRE | Unit for volume.
DEGREE_CELSIUS | Unit for thermodynamic temperature.
FARAD | Unit for electric capacitance.
GRAM | Unit for mass.
GRAY | Unit for absorbed radioactive dose.
HENRY | Unit for inductance.
HERTZ | Unit for frequency.
JOULE | Unit for energy.
KELVIN | Unit for thermodynamic temperature.
LUMEN | Unit for luminous flux.
LUX | Unit for illuminance.
METRE | Unit for length.
MOLE | Unit for amount of substance.
NEWTON | Unit for force.
OHM | Unit for electric resistance.
PASCAL | Unit for pressure.
RADIAN | Unit for plane angle.
SECOND | Unit for time.
SIEMENS | Unit for electric conductance.
SIEVERT | Unit for radioactive dose equivalent.
SQUARE_METRE | Unit for area.
STERADIAN | Unit for solid angle.
TESLA | Unit for magnetic flux density.
VOLT | Unit for electric voltage.
WATT | Unit for power.
WEBER | Unit for magnetic flux.

##### Formal representations

XML Specification
`<xs:simpleType name="IfcSIUnitName">
<xs:restriction base="xs:string">
<xs:enumeration value="ampere"/>
<xs:enumeration value="becquerel"/>
<xs:enumeration value="candela"/>
<xs:enumeration value="coulomb"/>
<xs:enumeration value="cubic_metre"/>
<xs:enumeration value="degree_celsius"/>
<xs:enumeration value="farad"/>
<xs:enumeration value="gram"/>
<xs:enumeration value="gray"/>
<xs:enumeration value="henry"/>
<xs:enumeration value="hertz"/>
<xs:enumeration value="joule"/>
<xs:enumeration value="kelvin"/>
<xs:enumeration value="lumen"/>
<xs:enumeration value="lux"/>
<xs:enumeration value="metre"/>
<xs:enumeration value="mole"/>
<xs:enumeration value="newton"/>
<xs:enumeration value="ohm"/>
<xs:enumeration value="pascal"/>
<xs:enumeration value="radian"/>
<xs:enumeration value="second"/>
<xs:enumeration value="siemens"/>
<xs:enumeration value="sievert"/>
<xs:enumeration value="square_metre"/>
<xs:enumeration value="steradian"/>
<xs:enumeration value="tesla"/>
<xs:enumeration value="volt"/>
<xs:enumeration value="watt"/>
<xs:enumeration value="weber"/>
</xs:restriction>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcSIUnitName = ENUMERATION OF (
AMPERE,
BECQUEREL,
CANDELA,
COULOMB,
CUBIC_METRE,
DEGREE_CELSIUS,
FARAD,
GRAM,
GRAY,
HENRY,
HERTZ,
JOULE,
KELVIN,
LUMEN,
LUX,
METRE,
MOLE,
NEWTON,
OHM,
PASCAL,
RADIAN,
SECOND,
SIEMENS,
SIEVERT,
SQUARE_METRE,
STERADIAN,
TESLA,
VOLT,
WATT,
WEBER);
END_TYPE;

EXPRESS-G diagram

`

References: IfcSIUnit

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