5.4.3.11 IfcRelContainedInSpatialStructure
| Localisation dans la structure spatiale |
| Zu räumlicher Struktur zugeordnet - Relation |
This objectified relationship,
IfcRelContainedInSpatialStructure, is used to assign
elements to a certain level of the spatial project
structure. Any element can only be assigned once to a
certain level of the spatial structure. The question, which
level is relevant for which type of element, can only be
answered within the context of a particular project and
might vary within the various regions.
EXAMPLE A multi-storey space is contained (or
belongs to) the building storey at which its ground level
is, but it is referenced by all the other building
storeys, in which it spans. A lift shaft might be
contained by the basement, but referenced by all storeys,
through which it spans.
The containment relationship of an element within a
spatial structure has to be a hierarchical relationship; an
element can only be contained within a single spatial
structure element. The reference relationship between an
element and the spatial structure need not be hierarchical;
that is, an element can reference many spatial structure
elements.
NOTE The reference relationship is expressed by IfcRelReferencedInSpatialStructure.
Predefined spatial structure elements to which elements can
be assigned are
Occurrences of the same element type can be assigned to
different spatial structure elements depending on the
context of the occurrence.
EXAMPLE A wall might be normally assigned
to a storey, however the curtain wall might be assigned
to the building and the retaining wall in the terrain
might be assigned to the site.
HISTORY New entity in IFC2x.
IFC2x CHANGE The data type of the attribute RelatedElements has been
changed from IfcElement to its supertype IfcProduct with upward compatibility for file based
exchange.
Containment Use Definition
Figure 31 shows the use of IfcRelContainedInSpatialStructure to assign a stair and two walls to two different levels within the spatial structure.
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Figure 31 — Relationship for spatial structure containment |
XSD Specification:
<xs:element name="IfcRelContainedInSpatialStructure" type="ifc:IfcRelContainedInSpatialStructure" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>
<xs:complexType name="IfcRelContainedInSpatialStructure">
<xs:complexContent>
<xs:extension base="ifc:IfcRelConnects">
<xs:sequence>
<xs:element name="RelatedElements">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcProduct" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcProduct"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
<xs:element name="RelatingStructure" type="ifc:IfcSpatialElement" nillable="true"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
EXPRESS Specification:
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ENTITY IfcRelContainedInSpatialStructure
|
|
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| WR31 | : | SIZEOF(QUERY(temp <* RelatedElements | 'IFCPRODUCTEXTENSION.IFCSPATIALSTRUCTUREELEMENT' IN TYPEOF(temp))) = 0; |
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Attribute Definitions:
| RelatedElements | : |
Set of products, which are contained within this level of the spatial structure hierarchy.
IFC2x CHANGE The data type has been changed from IfcElement to IfcProduct with upward compatibility
|
| RelatingStructure | : |
Spatial structure element, within which the element is contained. Any element can only be contained within one element of the project spatial structure.
IFC4 CHANGE The attribute RelatingStructure as been promoted to the new supertype IfcSpatialElement with upward compatibility for file based exchange.
|
Formal Propositions:
| WR31 | : |
The relationship object shall not be used to include other spatial structure elements into a spatial structure element. The hierarchy of the spatial structure is defined using IfcRelAggregates.
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Inheritance Graph:
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ENTITY IfcRelContainedInSpatialStructure
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