IfcLightFixtureType

Definition from IAI: An IfcLightFixtureType is a container type that is designed for the purpose of housing one or more lamps and the devices that control, restrict or vary their emission.

HISTORY: New class in IFC 2x2.

Use Definitions

An IfcLightFixtureType provides for all forms of light fixture and its usage defines the parameters for one or more occurrences of IfcFlowTerminal.

Instances of IfcFlowTerminal that are defined as types of IfcLightFixtureType have one or more instances of IfcFlowTerminal that are defined as types of IfcLampType connected using instances of IfcDistributionPort.

Rendering using lighting data is achieved using light source entities within the presentation capabilities of IFC.

Property Set Use Definition:

The property sets relating to the IfcLightFixtureType are defined by the IfcPropertySet and attached by the IfcRelDefinesByType relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to an IfcLightFixtureType are part of this IFC release:

Pset_ElectricalDeviceCommon: property set for properties that are common to all types of electrical devices, if available
Pset_LightFixtureTypeCommon: property set for properties that are common to all types of light fixtrure, if available
Pset_LightFixtureTypeThermal: specific property set for the thermal properties of a light fixture, if available
Pset_LightFixtureTypeExitSign: specific property set for the properties of an exit sign, if available

Geometry Use Definitions

Representations of the type are defined as representation maps (at the level of the supertype IfcTypeProduct). These are assigned at the occurrence through the IfcShapeRepresentation.Item being an IfcMappedItem.

EXPRESS specification:

ENTITY IfcLightFixtureType

SUBTYPE OF (

IfcFlowTerminalType);

PredefinedType

IfcLightFixtureTypeEnum;

END_ENTITY;

Attribute definitions:

PredefinedType

Identifies the predefined types of light fixture from which the type required may be set.

Inheritance graph

ENTITY IfcLightFixtureType;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcTypeObject;

ApplicableOccurrence

OPTIONAL IfcLabel;

HasPropertySets

OPTIONAL SET [1:?] OF IfcPropertySetDefinition;

INVERSE

ObjectTypeOf

SET [0:1] OF IfcRelDefinesByType FOR RelatingType;

ENTITY IfcTypeProduct;

RepresentationMaps

OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;

Tag

OPTIONAL IfcLabel;

ENTITY IfcElementType;

ElementType

OPTIONAL IfcLabel;

ENTITY IfcDistributionElementType;

ENTITY IfcDistributionFlowElementType;

ENTITY IfcFlowTerminalType;

ENTITY IfcLightFixtureType;

PredefinedType

IfcLightFixtureTypeEnum;

END_ENTITY;