IfcRelContainedInSpatialStructure
Definition from IAI: 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 reference relationship can be expressed by the general grouping
mechanism estabished in IFC.
Predefined spatial structure elements to which elements can be assigned
are
- site as IfcSite
- building as IfcBuilding
- storey as IfcBuildingStorey
- space as IfcSpace
The same element can be assigned to different spatial structure elements
depending on the context.
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 IFC Release 2x.
IFC2x PLATFORM CHANGE: The data
type of the attribute RelatedElements has been changed from
IfcElement to its supertype IfcProduct with upward compatibility
for file based exchange.
Use case:
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| The figure shows the use of
IfcRelContainedInSpatialStructure to assign a stair and two walls to two
different levels within the spatial structure. |
EXPRESS specification:
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| ENTITY IfcRelContainedInSpatialStructure
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| WR31
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:
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SIZEOF(QUERY(temp <* RelatedElements | 'IFCPRODUCTEXTENSION.IFCSPATIALSTRUCTUREELEMENT' IN TYPEOF(temp))) = 0;
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Attribute definitions:
| RelatedElements
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Set of elements products, which are contained within this level of the spatial structure hierarchy.
IFC2x PLATFORM CHANGE The data type has been changed from IfcElement to IfcProduct with upward compatibility
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| RelatingStructure
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Spatial structure element, within which the element is contained. Any element can only be contained within one element of the project spatial structure.
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Formal Propositions:
| WR31
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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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