Class Ifc4::IfcSIUnit

Nested Relationships

This class is a nested type of Struct Ifc4.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4::IfcSIUnit : public Ifc4::IfcNamedUnit

Definition from ISO/CD 10303-41:1992: An SI unit is the fixed quantity used as a standard in terms of which items are measured as defined by ISO 1000 (clause 2).

IfcSIUnit covers both standard base SI units such as meter and second, and derived SI units such as Pascal, square meter and cubic meter.

NOTE Corresponding ISO 10303 name: si_unit, please refer to ISO/IS 10303-41 for the final definition of the formal standard.

HISTORY New entity in IFC Release 1.5.1.

Public Types

typedef IfcTemplatedEntityList<IfcSIUnit> list

Public Functions

bool hasPrefix() const

Whether the optional attribute Prefix is defined for this IfcSIUnit.

::Ifc4::IfcSIPrefix::Value Prefix() const

The SI Prefix for defining decimal multiples and submultiples of the unit.

void setPrefix(::Ifc4::IfcSIPrefix::Value v)
::Ifc4::IfcSIUnitName::Value Name() const

The word, or group of words, by which the SI unit is referred to.

NOTE Even though the SI system’s base unit for mass is kilogram, the IfcSIUnit for mass is gram if no Prefix is asserted.

void setName(::Ifc4::IfcSIUnitName::Value v)
const IfcParse::entity &declaration() const
IfcSIUnit(IfcEntityInstanceData *e)
IfcSIUnit(::Ifc4::IfcUnitEnum::Value v2_UnitType, boost::optional<::Ifc4::IfcSIPrefix::Value> v3_Prefix, ::Ifc4::IfcSIUnitName::Value v4_Name)

Public Static Functions

const IfcParse::entity &Class()