7.4.3.29 IfcLightFixture

Fixation de lampe
Leuchte

A light fixture is a container that is designed for the purpose of housing one or more lamps and optionally devices that control, restrict or vary their emission.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 391.
Type
IfcLightFixtureType
IfcDistributionFlowElementType
IfcDistributionElementType

Table 391 — IfcLightFixture Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 392.
PredefinedTypeName
 Pset_LightFixtureTypeCommon
SECURITYLIGHTINGPset_LightFixtureTypeSecurityLighting
 Pset_SoundGeneration
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 392 — IfcLightFixture Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 393.
Name
Qto_LightFixtureBaseQuantities

Table 393 — IfcLightFixture Quantity Sets



Material Constituents

The Material Constituents concept applies to this entity as shown in Table 394.
NameDescription
CasingMaterial from which the casing is constructed.

Table 394 — IfcLightFixture Material Constituents



Connectivity

The Connectivity concept applies to this entity as shown in Table 395.

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 396.
PredefinedTypeNameFlowTypeDescription
POINTSOURCELineSINKELECTRICALThe power supply line, typically a cable connected to a switch.
POINTSOURCESocketSOURCELIGHTINGA socket providing electricity to a lamp with one terminal.
DIRECTIONSOURCELineSINKELECTRICALThe power supply line, typically a cable connected to a switch.
DIRECTIONSOURCESocket#1SOURCELIGHTINGA socket providing electricity to a lamp with two terminals.
DIRECTIONSOURCESocket#2SOURCELIGHTINGA socket providing electricity to a lamp with two terminals.
DIRECTIONSOURCESocket#3SOURCELIGHTINGA socket providing electricity to a lamp with two terminals.
DIRECTIONSOURCESocket#4SOURCELIGHTINGA socket providing electricity to a lamp with two terminals.

Table 396 — IfcLightFixture Port Nesting




XSD Specification:

 <xs:element name="IfcLightFixture" type="ifc:IfcLightFixture" substitutionGroup="ifc:IfcFlowTerminal" nillable="true"/>
 <xs:complexType name="IfcLightFixture">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowTerminal">
    <xs:attribute name="PredefinedType" type="ifc:IfcLightFixtureTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcLightFixture
SUBTYPE OF IfcFlowTerminal;
PredefinedType : OPTIONAL IfcLightFixtureTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcLightFixtureTypeEnum.USERDEFINED) OR ((PredefinedType = IfcLightFixtureTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCELECTRICALDOMAIN.IFCLIGHTFIXTURETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcLightFixtureType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no light fixture type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcLightFixtureType.

Inheritance Graph:

ENTITY IfcLightFixture
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
INVERSE
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
INVERSE
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
INVERSE
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
INVERSE
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowTerminal
ENTITY IfcLightFixture
PredefinedType : OPTIONAL IfcLightFixtureTypeEnum;
END_ENTITY;

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