# Latest **URL:** https://forums.buildingsmart.org/latest.md?page=1 [Latest](https://forums.buildingsmart.org/latest.md) · [Categories](https://forums.buildingsmart.org/categories.md) · [Tags](https://forums.buildingsmart.org/tags.md) **Page:** 2 --- ## [ifc Functional Parts ERD/UML](https://forums.buildingsmart.org/t/ifc-functional-parts-erd-uml/6332)
**Author:** [@bhargava.abhishek](https://forums.buildingsmart.org/u/bhargava.abhishek)\ **Replies:** 1\ **Last updated:** [November 16, 2025, 2:10pm UTC](https://forums.buildingsmart.org/t/ifc-functional-parts-erd-uml/6332 "2025-11-16T14:10:15Z")
For the IFC Functional Parts, looking for UML or ERD that reflects the IFC concepts associated with each part, their relationships and other associated IFC schema elements (e.g. property sets, properties, etc). So fa… --- ## [Error accessing https://ifc43-docs.standards.buildingsmart.org/ today](https://forums.buildingsmart.org/t/error-accessing-https-ifc43-docs-standards-buildingsmart-org-today/6330)
**Author:** [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\ **Replies:** 4\ **Last updated:** [November 13, 2025, 5:28pm UTC](https://forums.buildingsmart.org/t/error-accessing-https-ifc43-docs-standards-buildingsmart-org-today/6330 "2025-11-13T17:28:46Z")
From my end, I’m getting a HTTPS error from https://ifc43-docs.standards.buildingsmart.org/ The error is that the security certificate has expired (no longer https:). Can anyone else verify? --- ## [ifc 4x3 Geolocation formatting correct ?](https://forums.buildingsmart.org/t/ifc-4x3-geolocation-formatting-correct/6331)
**Author:** [@dalvarez](https://forums.buildingsmart.org/u/dalvarez)\ **Replies:** 1\ **Last updated:** [November 13, 2025, 9:23am UTC](https://forums.buildingsmart.org/t/ifc-4x3-geolocation-formatting-correct/6331 "2025-11-13T09:23:46Z")
Hello, I received a IFC 4x3 with a geolocation information, that I have never seeing and want to confirm if this is “correct\\allow” by the standards, as reading the documentation I am confused and not sure if is valid. … --- ## [Where and how will my colors be saved in IFC?](https://forums.buildingsmart.org/t/where-and-how-will-my-colors-be-saved-in-ifc/1806)
**Author:** [@Hans\_Lammerts](https://forums.buildingsmart.org/u/Hans_Lammerts)\ **Replies:** 53\ **Last updated:** [November 12, 2025, 2:26pm UTC](https://forums.buildingsmart.org/t/where-and-how-will-my-colors-be-saved-in-ifc/1806 "2025-11-12T14:26:41Z")
Hi , I still can’t figure out how colors are saved in IFC and why they are lost during the conversion proces. It is kind of important to set and save the colors in display because they represent a diameter. So… (other … --- ## [IFC to GIS](https://forums.buildingsmart.org/t/ifc-to-gis/6115)
**Author:** [@PepaR](https://forums.buildingsmart.org/u/PepaR)\ **Replies:** 7\ **Last updated:** [October 31, 2025, 8:22pm UTC](https://forums.buildingsmart.org/t/ifc-to-gis/6115 "2025-10-31T20:22:22Z")
Hello, We are trying to optimize the workflow for transferring geometry and information from IFC to the GIS system. Does anyone have any experience to share on this topic? --- ## [Clash Template like IDS ?](https://forums.buildingsmart.org/t/clash-template-like-ids/6311)
**Author:** [@Jocelin](https://forums.buildingsmart.org/u/Jocelin)\ **Replies:** 0\ **Last updated:** [October 19, 2025, 12:59am UTC](https://forums.buildingsmart.org/t/clash-template-like-ids/6311 "2025-10-19T00:59:32Z")
Hi, IDS have been develloped to check the quality of data inside IFC. But, it only focus on the data and not 3D data. With the IDS Facet, we now have a standardized way to select for object in model. I know that we can… --- ## [Qto\_\*\*\* properties expectations](https://forums.buildingsmart.org/t/qto-properties-expectations/6298)
**Author:** [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\ **Replies:** 7\ **Last updated:** [October 13, 2025, 11:28am UTC](https://forums.buildingsmart.org/t/qto-properties-expectations/6298 "2025-10-13T11:28:36Z")
As we further revise the US Bridge Design-to-Construction exchange standard, a question popped up about how the schema-defined Qto\_\* properties are expected to be used. I’ve looked at the documentation and past topic he… --- ## [🌍 Translations added to the IFC4.3 dev server](https://forums.buildingsmart.org/t/translations-added-to-the-ifc4-3-dev-server/6299)
**Author:** [@aothms](https://forums.buildingsmart.org/u/aothms)\ **Replies:** 0\ **Last updated:** [October 7, 2025, 3:34pm UTC](https://forums.buildingsmart.org/t/translations-added-to-the-ifc4-3-dev-server/6299 "2025-10-07T15:34:57Z")
Happy to inform you that the great work from Geert Hesselink to integrate the translations into the IFC4.3 live development platform is now live. See below in the inline image where, based on the dropdown box where end-u… --- ## [Should IFC have a convention that codifies what the representation looks like relative to if the object is ‘cut’ by some camera?](https://forums.buildingsmart.org/t/should-ifc-have-a-convention-that-codifies-what-the-representation-looks-like-relative-to-if-the-object-is-cut-by-some-camera/6291)
**Author:** [@Theoryshaw](https://forums.buildingsmart.org/u/Theoryshaw)\ **Replies:** 2\ **Last updated:** [September 29, 2025, 4:00pm UTC](https://forums.buildingsmart.org/t/should-ifc-have-a-convention-that-codifies-what-the-representation-looks-like-relative-to-if-the-object-is-cut-by-some-camera/6291 "2025-09-29T16:00:16Z")
Should IFC have a convention that codifies what the representation looks like relative to if the object is ‘cut’ by some some camera? Maybe a boolean attribute like TargetCut? Would allow things like door swings to not… --- ## [Video Tutorials for BonsaiBIM: a powerful BIM/CAD plugin for Blender](https://forums.buildingsmart.org/t/video-tutorials-for-bonsaibim-a-powerful-bim-cad-plugin-for-blender/6257)
**Author:** [@Theoryshaw](https://forums.buildingsmart.org/u/Theoryshaw)\ **Replies:** 1\ **Last updated:** [September 22, 2025, 5:22pm UTC](https://forums.buildingsmart.org/t/video-tutorials-for-bonsaibim-a-powerful-bim-cad-plugin-for-blender/6257 "2025-09-22T17:22:49Z")
As you may have seen on the OSArch forum, I’ve just released a new set of video tutorials for Bonsai (formerly BlenderBIM). If you’re interested, this series takes you from the basics of Blender through to creating a co… --- ## [IFC 5 Encoding](https://forums.buildingsmart.org/t/ifc-5-encoding/6276)
**Author:** [@RenzoVenuti](https://forums.buildingsmart.org/u/RenzoVenuti)\ **Replies:** 1\ **Last updated:** [September 9, 2025, 9:55am UTC](https://forums.buildingsmart.org/t/ifc-5-encoding/6276 "2025-09-09T09:55:47Z")
For ifc 5 the standard encoding will be UTF-8? --- ## [bSDD-Toolkit (OpenSource bSDD-json editor)](https://forums.buildingsmart.org/t/bsdd-toolkit-opensource-bsdd-json-editor/6277)
**Author:** [@cmellueh](https://forums.buildingsmart.org/u/cmellueh)\ **Replies:** 2\ **Last updated:** [September 4, 2025, 12:13pm UTC](https://forums.buildingsmart.org/t/bsdd-toolkit-opensource-bsdd-json-editor/6277 "2025-09-04T12:13:52Z")
Hello buildingSMART community, I created the bSDD-Toolkit to make it easier to create and modify bSDD JSON dictionaries without relying on Excel workflows. Key points: Native editing of bSDD JSON using a validated Py… --- ## [IFC 3D symbols with Psets as part of a national library](https://forums.buildingsmart.org/t/ifc-3d-symbols-with-psets-as-part-of-a-national-library/6264)
**Author:** [@Karin](https://forums.buildingsmart.org/u/Karin)\ **Replies:** 1\ **Last updated:** [August 26, 2025, 3:26pm UTC](https://forums.buildingsmart.org/t/ifc-3d-symbols-with-psets-as-part-of-a-national-library/6264 "2025-08-26T15:26:35Z")
At the Swedish transport administration we currently hold a library of 3D and 2D symbols with required properties as dgn and dwg. At the start of a project this library is shared with the assigned parties in a contract. … --- ## [Unique IDs in IFC5](https://forums.buildingsmart.org/t/unique-ids-in-ifc5/6183)
**Author:** [@Airy59](https://forums.buildingsmart.org/u/Airy59)\ **Replies:** 1\ **Last updated:** [August 23, 2025, 1:59pm UTC](https://forums.buildingsmart.org/t/unique-ids-in-ifc5/6183 "2025-08-23T13:59:28Z")
IFC5 alpha proposes to use unique IDs for “paths”. This choice suggests that unique name assumption is intended (different paths necessarily denote different “things”). Is that the intent? --- ## [Usage of IfcFacilityPartCommon](https://forums.buildingsmart.org/t/usage-of-ifcfacilitypartcommon/6100)
**Author:** [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\ **Replies:** 12\ **Last updated:** [August 21, 2025, 5:20pm UTC](https://forums.buildingsmart.org/t/usage-of-ifcfacilitypartcommon/6100 "2025-08-21T17:20:30Z")
In the US, we’ve proposed the following update to hierarchical structure for bridges: I am trying to confirm that this is permissible under the schema and the AbV. The question is whether this is an acceptable use of… --- ## [ROI regarding detailed element properties and material layers in a BIM model (e.g., Revit)](https://forums.buildingsmart.org/t/roi-regarding-detailed-element-properties-and-material-layers-in-a-bim-model-e-g-revit/6248)
**Author:** [@MoAli](https://forums.buildingsmart.org/u/MoAli)\ **Replies:** 1\ **Last updated:** [August 21, 2025, 7:53am UTC](https://forums.buildingsmart.org/t/roi-regarding-detailed-element-properties-and-material-layers-in-a-bim-model-e-g-revit/6248 "2025-08-21T07:53:44Z")
In your experience, is the additional time and effort spent adding detailed element properties and material layers in a BIM model (e.g., Revit) generally worth it in terms of the accuracy and reliability of quantity take… --- ## [Applicability for all Elements](https://forums.buildingsmart.org/t/applicability-for-all-elements/6234)
**Author:** [@CipZip](https://forums.buildingsmart.org/u/CipZip)\ **Replies:** 5\ **Last updated:** [August 11, 2025, 8:16am UTC](https://forums.buildingsmart.org/t/applicability-for-all-elements/6234 "2025-08-11T08:16:21Z")
Hi, I am currently writing IDS file for our BuildIM format which we use for evaluating IFC models. We are setting unique parameters to ech element inside Autodesk Revit and we need to later check with IDS that all Elemen… --- ## [Clarification IfcRelAssignsToActor\> ActingRole and IfcPerson/IfcOrganization\>Role](https://forums.buildingsmart.org/t/clarification-ifcrelassignstoactor-actingrole-and-ifcperson-ifcorganization-role/6198)
**Author:** [@Dimitrios](https://forums.buildingsmart.org/u/Dimitrios)\ **Replies:** 0\ **Last updated:** [July 9, 2025, 1:53pm UTC](https://forums.buildingsmart.org/t/clarification-ifcrelassignstoactor-actingrole-and-ifcperson-ifcorganization-role/6198 "2025-07-09T13:53:56Z")
The “5.1.3.22 IfcRelAssignsToActor - IFC 4.3.2 Documentation” relation contains an attribute “ActingRole”. Is that attribute adhering to the roles assigned to “IfcOrganization”/ “IfcPerson” to which the “IfcActor” is ref… --- ## [Pset for external influences (electrical installations of buildings)](https://forums.buildingsmart.org/t/pset-for-external-influences-electrical-installations-of-buildings/6196)
**Author:** [@PepaR](https://forums.buildingsmart.org/u/PepaR)\ **Replies:** 0\ **Last updated:** [July 7, 2025, 6:54am UTC](https://forums.buildingsmart.org/t/pset-for-external-influences-electrical-installations-of-buildings/6196 "2025-07-07T06:54:38Z")
Hello, I would like to ask what property set you use for external influences related standard IEC 60364-5-51 Electrical installations of buildings - Part 5-51: Selection and erection of electrical equipment - Common rul… --- ## [The PredefinedType shall only be used...](https://forums.buildingsmart.org/t/the-predefinedtype-shall-only-be-used/6180)
**Author:** [@Simon](https://forums.buildingsmart.org/u/Simon)\ **Replies:** 4\ **Last updated:** [July 2, 2025, 12:19pm UTC](https://forums.buildingsmart.org/t/the-predefinedtype-shall-only-be-used/6180 "2025-07-02T12:19:19Z")
My question: is it possible to check the following using IDS? I’ve tried for several hours but each IDS iteration either doesn’t work - it does’t find the error - or is ‘invalid’. I’ve received an Ifc4 (ReferenceView\_V1… --- ## [GUIDs in an BIM Project](https://forums.buildingsmart.org/t/guids-in-an-bim-project/2593)
**Author:** [@agron](https://forums.buildingsmart.org/u/agron)\ **Replies:** 29\ **Last updated:** [July 2, 2025, 9:19am UTC](https://forums.buildingsmart.org/t/guids-in-an-bim-project/2593 "2025-07-02T09:19:51Z")
Hello community, At which level does the validity of a GUID between stakeholders beginn? Since in an IFC File, everything has this unique number (not only objects), i was wondering how can this be implemented throughout… --- ## [BCF v. 2.1](https://forums.buildingsmart.org/t/bcf-v-2-1/6178)
**Author:** [@RenzoVenuti](https://forums.buildingsmart.org/u/RenzoVenuti)\ **Replies:** 0\ **Last updated:** [June 26, 2025, 1:51pm UTC](https://forums.buildingsmart.org/t/bcf-v-2-1/6178 "2025-06-26T13:51:46Z")
in BCF v.2.1 what is the correct form : or Thanks --- ## [IFC class for earthing rod](https://forums.buildingsmart.org/t/ifc-class-for-earthing-rod/5632)
**Author:** [@namio.sousa](https://forums.buildingsmart.org/u/namio.sousa)\ **Replies:** 4\ **Last updated:** [June 26, 2025, 7:55am UTC](https://forums.buildingsmart.org/t/ifc-class-for-earthing-rod/5632 "2025-06-26T07:55:55Z")
Is there any IFC class to classify an earthing rod? --- ## [bSDD API list class properties](https://forums.buildingsmart.org/t/bsdd-api-list-class-properties/6114)
**Author:** [@artur\_tomczak](https://forums.buildingsmart.org/u/artur_tomczak)\ **Replies:** 3\ **Last updated:** [June 26, 2025, 7:54am UTC](https://forums.buildingsmart.org/t/bsdd-api-list-class-properties/6114 "2025-06-26T07:54:05Z")
Question from a user: I am trying to access and read a specific Property Set from bSDD. However, I am encountering some difficulties. I am specifically interested in the following Property Set: Code: EC004822 Identi… --- ## [IFC 5 and Guid format](https://forums.buildingsmart.org/t/ifc-5-and-guid-format/6164)
**Author:** [@RenzoVenuti](https://forums.buildingsmart.org/u/RenzoVenuti)\ **Replies:** 1\ **Last updated:** [June 25, 2025, 10:12am UTC](https://forums.buildingsmart.org/t/ifc-5-and-guid-format/6164 "2025-06-25T10:12:15Z")
I’m looking at the ifc 5 master and I noticed that the guid format is changed from 22 characters to 32, but this way I don’t lose the references to the objects stored with the old format? --- ## [Comment line in IFC](https://forums.buildingsmart.org/t/comment-line-in-ifc/6146)
**Author:** [@Hans\_Lammerts](https://forums.buildingsmart.org/u/Hans_Lammerts)\ **Replies:** 3\ **Last updated:** [June 11, 2025, 5:13pm UTC](https://forums.buildingsmart.org/t/comment-line-in-ifc/6146 "2025-06-11T17:13:41Z")
Just wanna check if this is the right way to implement comments in IFC. Is it correct? --- ## [Door: OverallHeight](https://forums.buildingsmart.org/t/door-overallheight/6123)
**Author:** [@PepaR](https://forums.buildingsmart.org/u/PepaR)\ **Replies:** 3\ **Last updated:** [June 4, 2025, 10:00am UTC](https://forums.buildingsmart.org/t/door-overallheight/6123 "2025-06-04T10:00:41Z")
Hello, I would like ask what exactly is OverallHeight, please? Is it Height A, B, C, D or E? --- ## [Door: Clear Width and Height](https://forums.buildingsmart.org/t/door-clear-width-and-height/6124)
**Author:** [@PepaR](https://forums.buildingsmart.org/u/PepaR)\ **Replies:** 2\ **Last updated:** [June 4, 2025, 9:00am UTC](https://forums.buildingsmart.org/t/door-clear-width-and-height/6124 "2025-06-04T09:00:35Z")
Hello, I would like ask what is your recomendation how to get clear width and height for door, please? --- ## [IfcFaceBasedSurfaceModel documentation](https://forums.buildingsmart.org/t/ifcfacebasedsurfacemodel-documentation/6137)
**Author:** [@SJL](https://forums.buildingsmart.org/u/SJL)\ **Replies:** 1\ **Last updated:** [June 2, 2025, 7:11am UTC](https://forums.buildingsmart.org/t/ifcfacebasedsurfacemodel-documentation/6137 "2025-06-02T07:11:39Z")
In documentation it says “IFC4-CHANGE The entity has been deprecated and shall not be used. The entity IfcFacetedBrep shall be used instead.” However FacetedBrep is a solid model. IfcFaceBasedSurfaceModel is not (necess… --- ## [Official Model View Definitions for IFC 4.3](https://forums.buildingsmart.org/t/official-model-view-definitions-for-ifc-4-3/5737)
**Author:** [@schilu](https://forums.buildingsmart.org/u/schilu)\ **Replies:** 6\ **Last updated:** [June 2, 2025, 6:01am UTC](https://forums.buildingsmart.org/t/official-model-view-definitions-for-ifc-4-3/5737 "2025-06-02T06:01:17Z")
Hi, Where can I find the definitions of the official Model View Definitions (Reference View, Alignment Based Reference View, Design Transfer View) for IFC 4.3? There is no direct link in the IFC documentation. Also, th… [Previous page](https://forums.buildingsmart.org/latest.md) [Next page](https://forums.buildingsmart.org/latest.md?page=2)