#### 5.4.3.17 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:

- common properties within shared property sets
- common material information
- common shape representations

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.

## Building Automation

The following concepts are inherited at supertypes:

- IfcRoot: Revision Control
- IfcElementType: Table Mapping

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

Property Sets for Types

The Property Sets for Types concept applies to this entity as shown in Table 33.

Name
Pset_ManufacturerTypeInformation
Table 33 — IfcTransportElementType Property Sets for Types

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

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;

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 IfcStrippedOptional;
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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