As pointed out by Soren Spile, according to ISO 704 Terminology work — Principles and methods one of the rules for making definitions is that the term being defined must not be used in the definition to avoid circular definitions. In IFC4.3 there are around 20% circular definitions.
Example 1:
"IfcShadingDeviceType" – "The building element type IfcShadingDeviceType defines commonly shared information for occurrences of shading devices.;"
Example 2:
"IfcStairFlight" – "A stair flight is an assembly of building components..."
As pointed out by Soren Spile, according to ISO 704 Terminology work — Principles and methods one of the rules for making definitions is that the term being defined must not be used in the definition to avoid circular definitions. In IFC4.3 there are around 20% circular definitions.
Example 1: "IfcShadingDeviceType" – "The building element type IfcShadingDeviceType defines commonly shared information for occurrences of shading devices.;"
Example 2: "IfcStairFlight" – "A stair flight is an assembly of building components..."