4.1.1 Project Declaration

The project provides a directory of object types and property templates contained within using declaration relationships.

NOTE  The actual object occurrences used within the context of a project, such as walls, beams, air outlets, are assigned to a spatial hierarchy that is linked to the project using the aggregation hierarchy. See concept Spatial Decomposition for linking a spatial structure to the project.

Figure 1 illustrates an instance diagram.

Project DeclarationIfcContextIfcRelDeclaresIfcTypeObjectIfcPropertySetTemplate

Figure 1 — Project Declaration

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