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Spatial Decomposition concept definition


Seems that there are some adjustments required for the concept “Spatial Decomposition” in the published schemas.

There is a note on this page:

NOTE The link between the project and the highest level spatial element is provided by this concept through IfcRelContainedInSpatialStructure and not through declaration using IfcRelDeclares. This is a known anomaly intruduced to maintain compatibility with earlier versions of this standard.

Aside from the typo for “intruduced” it mentions the relationship IfcRelContainedInSpatialStructure that can’t be related to a project (only an IfcSpatialElement). It also seems to me that the concept is nominating the name attribute to be involved which seems incorrect.


Thanks @jonm - it seems to be a mistake - the link between IfcProject and IfcSite (which normally is the highest spatial structure element) is handled by IfcRelAggregate. It should be corrected with the next documentation update.