IfcLightFixtureType

Natural language names
deLeuchte - Typ
enLight Fixture Type
frType de fixation de lampe
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcLightFixtureType
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      ApplicableOccurrenceMODIFIEDType changed from IfcLabel to IfcIdentifier.
Semantic definitions at the entity
Entity definition

The flow terminal type IfcLightFixtureType defines commonly shared information for occurrences of light fixtures. The set of shared information may include:

It is used to define a light fixture type specification indicating the specific product information that is common to all occurrences of that product type. The IfcLightFixtureType may be declared within IfcProject or IfcProjectLibrary using IfcRelDeclares and may be exchanged with or without occurrences of the type. Occurrences of IfcLightFixtureType are represented by instances of IfcLightFixture. Refer to the documentation at IfcLightFixture for supported property sets, materials, composition, and ports.

Attribute definitions
#AttributeTypeCardinalityDescription B
10PredefinedTypeIfcLightFixtureTypeEnum[1:1]

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

X
Inherited definitions from supertypes
Entity inheritance IfcFlowTerminalType IfcDistributionFlowElementType IfcDistributionElementType IfcElementType IfcTypeProduct IfcTypeObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionB
IfcRoot
1GlobalIdIfcGloballyUniqueId[1:1] Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory[0:1] Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE  only the last modification in stored - either as addition, deletion or modification.
X
3NameIfcLabel[0:1] Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. X
4DescriptionIfcText[0:1] Optional description, provided for exchanging informative comments.X
IfcObjectDefinition
HasAssignmentsIfcRelAssigns
@RelatedObjects		S[0:?]Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups.X
NestsIfcRelNests
@RelatedObjects		S[0:1]References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).
IsNestedByIfcRelNests
@RelatingObject		S[0:?]References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). X
HasContextIfcRelDeclares
@RelatedDefinitions		S[0:1]References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.
IsDecomposedByIfcRelAggregates
@RelatingObject		S[0:?]References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts). X
DecomposesIfcRelAggregates
@RelatedObjects		S[0:1]References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only). X
HasAssociationsIfcRelAssociates
@RelatedObjects		S[0:?]Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.X
IfcTypeObject
5ApplicableOccurrence- This attribute is out of scope for this model view definition and shall not be set.
6HasPropertySetsIfcPropertySetDefinitionS[1:?] Set list of unique property sets, that are associated with the object type and are common to all object occurrences referring to this object type. X
TypesIfcRelDefinesByType
@RelatingType		S[0:1]Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type.
IfcTypeProduct
7RepresentationMapsIfcRepresentationMap~L[1:?] List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given.X
8Tag- This attribute is out of scope for this model view definition and shall not be set.
ReferencedByIfcRelAssignsToProduct
@RelatingProduct		S[0:?]Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product type.
IfcElementType
9ElementType- This attribute is out of scope for this model view definition and shall not be set.
IfcDistributionElementType
IfcDistributionFlowElementType
IfcFlowTerminalType
IfcLightFixtureType
10PredefinedTypeIfcLightFixtureTypeEnum[1:1]

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

X
Definitions applying to Bridge View

 Instance diagram

This entity is used to capture definitions of light fixtures, which includes fixtures for street lighting anchored to railings or bridge decks, as well as any other lighting attached or embedded within abutments or piers.

As geometry for light fixtures is typically of complex nature and provided by manufacturers in the form of tessellated models, a tessellated representation may capture any arbitrary shape.

Light fixtures may also define lighting power, direction, and color with an optional lighting representation.

Concept usage

Type Body Tessellated Geometry

The Type Body Tessellated Geometry concept applies to this entity.

As light fixtures for bridges are manufactured products and typically have complex geometry, the parameters for such geometry are out of scope. Therefore, tessellated representations are to be used.

Exchange
Import O
Export O


Type Lighting Geometry

The Type Lighting Geometry concept applies to this entity.

Lighting information may be defined to indicate lighting requirements and rendering.

Exchange
Import O
Export O


Concept inheritance

#ConceptModel View
IfcRoot
Software IdentityBridge View
User IdentityBridge View
Object OwnershipBridge View
IfcTypeObject
Property Sets for TypesBridge View
IfcLightFixtureType
Type Body Tessellated GeometryBridge View
Type Lighting GeometryBridge View
Formal representations
XSD Specification
 <xs:element name="IfcLightFixtureType" type="ifc:IfcLightFixtureType" substitutionGroup="ifc:IfcFlowTerminalType" nillable="true"/>
 <xs:complexType name="IfcLightFixtureType">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowTerminalType">
    <xs:attribute name="PredefinedType" type="ifc:IfcLightFixtureTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcLightFixtureType
 SUBTYPE OF (IfcFlowTerminalType);
  PredefinedType : IfcLightFixtureTypeEnum;
 WHERE
  CorrectPredefinedType : (PredefinedType <> IfcLightFixtureTypeEnum.USERDEFINED) OR ((PredefinedType = IfcLightFixtureTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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