5.4.3.55 IfcTransportElementType

Type d'équipement de transport
Beförderungsgerät - Typ

The element type IfcTransportElementType defines commonly shared information for occurrences of transport elements. The set of shared information may include:

It is used to define a transport element specification (i.e. the specific product information that is common to all occurrences of that beam type). Transport element types (or the instantiable subtypes) may be exchanged without being already assigned to occurrences.

The occurrences of the IfcTransportElementType are represented by instances of IfcTransportElement (or its subtypes).

HISTORY  New entity in IFC2x2.

Geometry Use Definition

The IfcTransportElementType may define the shared geometric representation for all transport element occurrences. The RepresentationMaps attribute refers to a list of IfcRepresentationMap's, that allow for multiple geometric representations (e.g. with IfcShaperepresentation's having an RepresentationIdentifier 'Box', 'FootPrint', or 'Body').

NOTE  The product shape representations are defined as RepresentationMaps (attribute of the supertype IfcTypeProduct), which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item[n] being an IfcMappedItem. See IfcTypeProduct for further information.
NOTE  The values of attributes RepresentationIdentifier and RepresentationType of IfcShapeRepresentation are restricted in the same way as those for IfcTransportElementType.

XSD Specification:

 <xs:element name="IfcTransportElementType" type="ifc:IfcTransportElementType" substitutionGroup="ifc:IfcElementType" nillable="true"/>
 <xs:complexType name="IfcTransportElementType">
  <xs:complexContent>
   <xs:extension base="ifc:IfcElementType">
    <xs:attribute name="PredefinedType" type="ifc:IfcTransportElementTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcTransportElementType
SUBTYPE OF IfcElementType;
PredefinedType : IfcTransportElementTypeEnum;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcTransportElementTypeEnum.USERDEFINED) OR ((PredefinedType = IfcTransportElementTypeEnum.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 the transport element. There may be property set definitions available for each predefined type.

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcTransportElementType
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 IfcTransportElementType
PredefinedType : IfcTransportElementTypeEnum;
END_ENTITY;

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