#### 5.4.3.6 IfcElementType

| Type d'élément
| Element - Typ

IfcElementType defines a list of commonly shared property set definitions of an element 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 instance through the IfcShapeRepresentation.Item[1] being an IfcMappedItem.

An element type is used to define the common properties of a certain type or style of an element that may be applied to instances of that element type to assign a specific style. Element types (the instantiable subtypes) may be exchanged without being already assigned to occurrences.

> HISTORY New entity in IFC2x2

## Building Automation

The following concepts are inherited at supertypes:

- IfcRoot: Revision Control

Instance diagram

Property Sets for Types

The Property Sets for Types concept applies to this entity as shown in Table 25.

Name
Pset_ManufacturerTypeInformation
Table 25 — IfcElementType Property Sets for Types

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

Table Mapping

The Table Mapping concept applies to this entity as shown in Table 26.

Table | Column | Unit | Reference
--- | --- | --- | ---
Type | Name |  | IfcElementType.Name
Type | CreatedBy |  | IfcElementType.OwnerHistory\IfcOwnerHistory.OwningUser\IfcPersonAndOrganization.ThePerson\IfcPerson.Identification
Type | CreatedOn |  | IfcElementType.OwnerHistory\IfcOwnerHistory.CreationDate
Type | Category |  | IfcElementType.HasAssociations[*]\IfcRelAssociatesClassification.RelatingClassification\IfcClassificationReference.Identification
Type | Description |  | IfcElementType.Description
Type | Manufacturer |  | IfcElementType.HasPropertySets['Pset_ManufacturerTypeInformation']\IfcPropertySet.HasProperties['Manufacturer']\IfcPropertySingleValue.NominalValue\IfcLabel
Type | ModelNumber |  | IfcElementType.HasPropertySets['Pset_ManufacturerTypeInformation']\IfcPropertySet.HasProperties['ModelReference']\IfcPropertySingleValue.NominalValue\IfcIdentifier
Type | ExtSystem |  | IfcElementType.OwnerHistory\IfcOwnerHistory.OwningApplication\IfcApplication.ApplicationIdentifier
Type | ExtObject |  | IfcElementType\
Type | ExtIdentifier |  | IfcElementType.GlobalId
Type | ModelReference |  | IfcElementType.HasPropertySets['Pset_ManufacturerTypeInformation']\IfcPropertySet.HasProperties['ModelReference']\IfcPropertySingleValue.NominalValue\IfcLabel
Type | ControlTypeIdentifier |  | IfcElement.HasAssocations['Control']\IfcRelAssociatesClassification.RelatingClassification\IfcClassificationReference.Identification
Table 26 — IfcElementType Table Mapping

Device types map to the 'Type' table compatible with COBie but with an additional column to hold the device type identifier (for applicable control system protocols).

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

XSD Specification:

<xs:element name="IfcElementType" type="ifc:IfcElementType" abstract="true" substitutionGroup="ifc:IfcTypeProduct" nillable="true"/>
<xs:complexType name="IfcElementType" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcTypeProduct"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcElementType

| ABSTRACT SUPERTYPE OF(ONEOF(IfcDistributionElementType, IfcTransportElementType))

| SUBTYPE OF IfcTypeProduct;

ElementType | : | OPTIONAL IfcLabel;

END_ENTITY;

EXPRESS-G diagram

Attribute Definitions:

ElementType | : | The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute 'PredefinedType' is set to USERDEFINED.

Inheritance Graph:

ENTITY IfcElementType

| 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;

END_ENTITY;

Link to this page