We are struggling with utilizing IFC 4.3 infrastructure domains (as well as discipline specific domains). As an example, when exporting from revit everything goes under the building domain. We are looking for a little bit more control over how these domains are exported. If not, we cannot query comp…

Hi @elva , it’s a good question. I don’t see how bSDD could help since it’s more about implementing IFC4.3 in particular software. The standard only recently was submitted for ISO. It can take some time for wide adoption. Regarding Revit, let me ping @angel.velez .

@elva - are you managing to export ifc4.3 from Revit? How are you managing that - i have been trying with no success. I really want to make use of the infra domains.

Hi Daniel Peel, When exporting from Revit 2023 and above for example I am using <IFC4x3 [Experimental] Setup> [image] But in Revit when exporting it automatically assigns it to Building; but it is possible to use IfcSpatialElement; IfcFacility to assign it to IfcBridge, IfcRailway, IfcRoad as sh…

Many thanks @elva - i found the Ifc4.3 export but have the same problem - it always goes Project, Site, Building first. If you try to identify something as any other kind of IfcFacility it seems to just aggregate that IfcFacility into IfcBuilding. I will be interested to see if anyone has a solutio…

@DanPeel - I’ve pinged @angel.velez to see if he can assist… but this is probably another situation where you should go through Autodesk/Revit Support channels to get an answer.

The IFC4.3 support in Revit is just as it says - it is a WIP. If you have specific needs (like, don’t give me a building) then we can prioritize those. In general, we are waiting for (1) confirmation that people are actually using it and (2) some sort of certification to do extra work in the area. …

But to Jeff’s point - if you go through support it will be logged. If you skip support that’s fine, but I do have a very long summer holiday coming up so it might be a while before you see a response :slight_smile:

Log with support how exactly? Is there a particular forum or something for requesting additional features or pointing out potential issues with how things are implemented? Apologies for my ignorance - Im interested in creating better IFC models in the maritime sector - Im not very Revit competent. M…

Try: Contact Customer Support | Autodesk Support . You could also post it on Revit’s forum: https://forums.autodesk.com/t5/revit-architecture-forum/bd-p/133

bSDD - buildingSMART Data Dictionary and classification of IFC 4x3 Domain mapping?

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elva August 14, 2024, 12:06pm 11

Hi DanPeel, You probably already know this but just wanted to share that in Revit 2025 version it became easy to Assign Facility type when exporting:

Topic		Replies	Views
About the IFC4.3 Building Room - Building Domain Review category IFC4.3 Building Room - Building Domain Review	9	1224	February 23, 2022
IfcRelSpaceBoundary IFC	17	3452	February 8, 2025
Guidelines for Ifc4x3 (add2) exports to Ifc2x3 (tc1) and Ifc4 (add2 tc1)? Developers	0	168	January 23, 2024
IFC4.3 RC2 Domain layer	0	477	December 2, 2020
Topography with IfcGeographicElement? IFC ifc4	13	5175	February 1, 2019

bSDD - buildingSMART Data Dictionary and classification of IFC 4x3 Domain mapping?

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