#### 5.4.3.20 IfcSpatialStructureElementType

| Type d'élément de la structure spatiale
| Räumliches Strukturelement - Typ

The element type (IfcSpatialStructureElementType) defines a list of commonly shared property set definitions of a spatial structure element and an optional set of product representations. It is used to define an element specification (i.e. the specific element information, that is common to all occurrences of that element 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 spatial structure element type is used to define the common properties of a certain type of a spatial structure element that may be applied to many instances of that type to assign a specific style. Spatial structure element types (the instantiable subtypes) may be exchanged without being already assigned to occurrences.

> NOTE The spatial structure element types are often used to represent catalogues of predefined spatial types for shared attributes, less so for sharing a common representation map.

The occurrences of subtypes of the abstract IfcSpatialStructureElementType are represented by instances of subtypes of IfcSpatialStructureElement.

> HISTORY New entity in IFC2x3.

XSD Specification:

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

EXPRESS Specification:

ENTITY IfcSpatialStructureElementType

| ABSTRACT SUPERTYPE OF(IfcSpaceType)

| SUBTYPE OF (IfcSpatialElementType);

END_ENTITY;

Inheritance Graph:

ENTITY IfcSpatialStructureElementType

| 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 IfcStrippedOptional;
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 IfcStrippedOptional;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcSpatialElementType

ElementType | : | OPTIONAL IfcStrippedOptional;

| ENTITY IfcSpatialStructureElementType

END_ENTITY;

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