Definition from IAI: A spatial structure element
(IfcSpatialStructureElement) is the generalization of all spatial
elements that might be used to define a spatial structure. That spatial
structure is often used to provide a project structure to organize a building
A spatial project structure might define as many levels of decomposition
as necessary for the building project. Elements within the spatial project
- site as IfcSite
- building as IfcBuilding
- storey as IfcBuildingStorey
- space as IfcSpace
or aggregations or parts thereof. The composition type declares an
element to be either an element itself, or an aggregation (complex) or a
decomposition (part). The interpretation of these types is given at each
subtype of IfcSpatialStructureElement.
The IfcRelAggregates is defined as an 1-to-many relationship and
used to establish the relationship between exactly two levels within the
spatial project structure. Finally the highest level of the spatial structure
is assigned to IfcProject using the IfcRelAggregates.
- The spatial project structure, established by the
IfcRelAggregates, shall be acyclic.
- A site should not be (directly or indirectly) associated to a
building, storey or space.
- A building should not be (directly or indirectly) associated to a
storey or space.
- A storey should not be (directly or indirectly) associated to a
HISTORY New entity in IFC Release 2.x
NOTE Previous entity IfcSpatialElement has been replaced.
issue and change log for changes made in IFC Release
|The figure shows the use of
IfcRelAggregates to establish a spatial structure including site,
building, building section and storey.
|| Long name for a spatial structure element, used for informal purposes. Maybe used in conjunction with
the inherited Name attribute.
|| Denotes, whether the predefined spatial structure element represents itself, or an aggregate (complex)
or a part (part). The interpretation is given separately for each subtype of spatial structure element.
|| Set of relationships, that holds those elements, which are associated with this element of the spatial