Do IfcSpaces in Reference View allow anything except IfcExtrudedAreaSolid/IfcRevolvedAreaSolid based on IndexedPolyCurves?
RV doc clearly states that only Body SweptSolid PolyCurve Geometry concept is applied. I am a bit confused seeing files exported from certified software with IfcSpaces represented by IfcTesseletedItems from time to time. 
Am I missing something?
IFC2x3 or IFC4 certification? IFC2x3 CV2.0 ≠ IFC4 RV1.2
Are you looking at IFC2x3 or IFC4 files?
Also, are they IfcSpace objects or might they be Space Boundaries related to the Space?
I am talking only about IfcSpace objects in IFC4 RV1.2. Looking at concepts applicable to IfcSpace I don’t see Body Tesselation Geometry or Body Brep Geometry. Moreover, Body Tessellation Geometry concept is not applicable to IfcSpace even in IFC 4.0.2.1 scheme.
According to the docs I am making a conclusion:
Q: How does one represent IfcSpace bodies in IFC4 RV1.2?
A: Using only Extruded Area solid based on IndexedPolyCurve profile
Q: How does one represent IfcSpace bodies in IFC 4.0.2.1?
A: SweptSolid, Brep, or Clipping will do
And it’s impossible to use TessellatedItems for Body representations of IfcSpace neither in RV1.2 nor in IFC4.0.2.1
That’s a good question, unfortunately, I don’t know the answer😀 Maybe @mweise could help us out?
@claimred, could you provide us with such a file? Or tell us which authoring tool is exporting that way?
If you don’t mind, I would prefer someone to confirm that I’m not seeing things, RV1.2 doc is up-to-date and there is no special case somewhere that I’m not seeing. That would clear things up for us.
Are the following statements correct?
ExtrudedAreaSolid/RevolvedAreaSolid based on IndexedPolyCurve is the only allowed Body Representation for IfcSpace entities in RV1.2
Files with IfcSpaces with Brep or Tessellation bodies are not valid RV1.2 files
