6.1.3.5 IfcBuildingElementProxyType

Type d'élément de construction non défini
Bauteil / Bauelement - beliebig - Typ

IfcBuildingElementProxyType defines a list of commonly shared property set definitions of a building element proxy and an optional set of product representations. It is used to define an element specification (i.e. the specific product information, that is common to all occurrences of that product type).

NOTE  The product representations are defined as representation maps (at the level of the supertype IfcTypeProduct, which gets assigned by an element occurrence instance through the IfcShapeRepresentation.Item[1] being an IfcMappedItem.

A building element proxy type is used to define the common properties of a certain type of a building element proxy that may be applied to many instances of that type to assign a specific style. Building element proxy types may be exchanged without being already assigned to occurrences.

NOTE  Although an building element proxy does not have a predefined ontological meaning the provision of a type may be helpful in sharing information among multiple occurrences. Applications that provide type information for element types not yet included in the current IFC specification can use the IfcBuildingElementProxyType to exchange such types.

The occurrences of the IfcBuildingElementProxyType are represented by instances of IfcBuildingElementProxy.

HISTORY  New entity in IFC2x3.

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Type Body Geometry

The Type Body Geometry concept applies to this entity.




XSD Specification:

 <xs:element name="IfcBuildingElementProxyType" type="ifc:IfcBuildingElementProxyType" substitutionGroup="ifc:IfcBuildingElementType" nillable="true"/>
 <xs:complexType name="IfcBuildingElementProxyType">
  <xs:complexContent>
   <xs:extension base="ifc:IfcBuildingElementType">
    <xs:attribute name="PredefinedType" type="ifc:IfcBuildingElementProxyTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcBuildingElementProxyType
SUBTYPE OF IfcBuildingElementType;
PredefinedType : IfcBuildingElementProxyTypeEnum;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcBuildingElementProxyTypeEnum.USERDEFINED) OR ((PredefinedType = IfcBuildingElementProxyTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

PredefinedType : Predefined types to define the particular type of an building element proxy. There may be property set definitions available for each predefined or user defined type.

Formal Propositions:

CorrectPredefinedType : The inherited attribute ElementType shall be provided, if the PredefinedType is set to USERDEFINED.

Inheritance Graph:

ENTITY IfcBuildingElementProxyType
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 IfcTypeObject
ApplicableOccurrence : OPTIONAL IfcIdentifier;
HasPropertySets : OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
INVERSE
Types : SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct
RepresentationMaps : OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag : OPTIONAL IfcLabel;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElementType
ElementType : OPTIONAL IfcLabel;
ENTITY IfcBuildingElementType
ENTITY IfcBuildingElementProxyType
PredefinedType : IfcBuildingElementProxyTypeEnum;
END_ENTITY;

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