# Latest **URL:** https://forums.buildingsmart.org/latest.md?page=3 [Latest](https://forums.buildingsmart.org/latest.md) · [Categories](https://forums.buildingsmart.org/categories.md) · [Tags](https://forums.buildingsmart.org/tags.md) **Page:** 4 --- ## [Appending Custom Properties and PropertySets](https://forums.buildingsmart.org/t/appending-custom-properties-and-propertysets/5779)
**Author:** [@agron](https://forums.buildingsmart.org/u/agron)\ **Replies:** 7\ **Last updated:** [December 18, 2024, 10:06pm UTC](https://forums.buildingsmart.org/t/appending-custom-properties-and-propertysets/5779 "2024-12-18T22:06:50Z")
Hi everyone, I have a question concerning custom Properties and their custom PropertySets. In my knowlegde a PropertySet with its Properties is going to be applicable for the whole entity with its all Enumerations. The… --- ## [IDS - Allowing two entities, but they have different PrefinedTypes](https://forums.buildingsmart.org/t/ids-allowing-two-entities-but-they-have-different-prefinedtypes/5794)
**Author:** [@fmohus](https://forums.buildingsmart.org/u/fmohus)\ **Replies:** 2\ **Last updated:** [December 18, 2024, 11:54am UTC](https://forums.buildingsmart.org/t/ids-allowing-two-entities-but-they-have-different-prefinedtypes/5794 "2024-12-18T11:54:42Z")
I am trying to specity a situation where both IfcSpatialZone and IfcSpace are allowed entities for setting up so called “Functional Unit” zones in the IFC 4 model. A modeller using IfcSpatialZone shall set Predefined ty… --- ## [Example IfcBuildingStorey decomposed in parts](https://forums.buildingsmart.org/t/example-ifcbuildingstorey-decomposed-in-parts/5793)
**Author:** [@Teun](https://forums.buildingsmart.org/u/Teun)\ **Replies:** 0\ **Last updated:** [December 9, 2024, 10:17am UTC](https://forums.buildingsmart.org/t/example-ifcbuildingstorey-decomposed-in-parts/5793 "2024-12-09T10:17:04Z")
In our project there are several levels that are almost but not completely the same. We have 4 BuildingStorey which can be the first floor and 4 which can be the second floor. (I know) In the documentation I read that a… --- ## [IfcAsset and IfcInventory SW implementation](https://forums.buildingsmart.org/t/ifcasset-and-ifcinventory-sw-implementation/3440)
**Author:** [@daviddelven](https://forums.buildingsmart.org/u/daviddelven)\ **Replies:** 5\ **Last updated:** [December 2, 2024, 9:52pm UTC](https://forums.buildingsmart.org/t/ifcasset-and-ifcinventory-sw-implementation/3440 "2024-12-02T21:52:26Z")
Hello to everybody, Does someone know about some SW implementation enabling the mapping or creation of the following IfcGroup subtypes: IfcAsset IfcInventory Thanks in advance David --- ## [IfcBuilding geometric representation](https://forums.buildingsmart.org/t/ifcbuilding-geometric-representation/2777)
**Author:** [@KavehAll](https://forums.buildingsmart.org/u/KavehAll)\ **Replies:** 3\ **Last updated:** [December 2, 2024, 1:32pm UTC](https://forums.buildingsmart.org/t/ifcbuilding-geometric-representation/2777 "2024-12-02T13:32:00Z")
Although IfcBuilding is of IfcSpatialElement subtypes, it has or can have a geometric representation. While the walls, storeys and roofs(subtypes of IfcElements )have their own geometric representation ,and almost always… --- ## [What is the default for a derived unit that isn't set in the file?](https://forums.buildingsmart.org/t/what-is-the-default-for-a-derived-unit-that-isnt-set-in-the-file/5759)
**Author:** [@angel.velez](https://forums.buildingsmart.org/u/angel.velez)\ **Replies:** 6\ **Last updated:** [November 20, 2024, 1:28pm UTC](https://forums.buildingsmart.org/t/what-is-the-default-for-a-derived-unit-that-isnt-set-in-the-file/5759 "2024-11-20T13:28:44Z")
We are doing some work on importing parameters and found an interesting case. We have an old (not Revit) file that has a VOLUMETRICFLOWRATE property, but no corresponding derived unit. The unit assignments in the file … --- ## [Requiring the existence of Predefined Type](https://forums.buildingsmart.org/t/requiring-the-existence-of-predefined-type/5760)
**Author:** [@fmohus](https://forums.buildingsmart.org/u/fmohus)\ **Replies:** 3\ **Last updated:** [November 13, 2024, 2:44pm UTC](https://forums.buildingsmart.org/t/requiring-the-existence-of-predefined-type/5760 "2024-11-13T14:44:00Z")
We are trying to set up an IDS specification that requires the existence of PredefinedType for certain entities. A typcical example would be IfcCovering where we need PredefinedType to be able to distinguish between CEIL… --- ## [IfcConstructionProductResource limitation use case in Cost Norms/ Resource Built-up](https://forums.buildingsmart.org/t/ifcconstructionproductresource-limitation-use-case-in-cost-norms-resource-built-up/5754)
**Author:** [@Dimitrios](https://forums.buildingsmart.org/u/Dimitrios)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 10:18pm UTC](https://forums.buildingsmart.org/t/ifcconstructionproductresource-limitation-use-case-in-cost-norms-resource-built-up/5754 "2024-11-11T22:18:57Z")
I have posted a detailed issue in the Git Repo IfcConstructionProductResource limitation use case in Cost Norms/ Resource Built-up · Issue #911 · buildingSMART/IFC4.3.x-development · GitHub with respect to a recent modif… --- ## [Certification aspect geolocation](https://forums.buildingsmart.org/t/certification-aspect-geolocation/5750)
**Author:** [@Hans\_Lammerts](https://forums.buildingsmart.org/u/Hans_Lammerts)\ **Replies:** 0\ **Last updated:** [November 8, 2024, 9:05pm UTC](https://forums.buildingsmart.org/t/certification-aspect-geolocation/5750 "2024-11-08T21:05:56Z")
I was wondering. To what extend is handling geolocation part of the certification process of ifc certified software? (assuming geo-referencing is correctly applied) --- ## [Detection of a quantity set in an IFC entity](https://forums.buildingsmart.org/t/detection-of-a-quantity-set-in-an-ifc-entity/5745)
**Author:** [@aperezga](https://forums.buildingsmart.org/u/aperezga)\ **Replies:** 0\ **Last updated:** [November 6, 2024, 12:34pm UTC](https://forums.buildingsmart.org/t/detection-of-a-quantity-set-in-an-ifc-entity/5745 "2024-11-06T12:34:38Z")
Hello everyone, I would like to know if there is a possibility to detect through IDS if an IFC entity of an IFC2x3 model has a set of quantities defined. I don’t know the name of the set or the quantities it contains, I… --- ## [Specifying data type for table value with multiple data types?](https://forums.buildingsmart.org/t/specifying-data-type-for-table-value-with-multiple-data-types/5740)
**Author:** [@fmohus](https://forums.buildingsmart.org/u/fmohus)\ **Replies:** 2\ **Last updated:** [November 5, 2024, 2:56pm UTC](https://forums.buildingsmart.org/t/specifying-data-type-for-table-value-with-multiple-data-types/5740 "2024-11-05T14:56:04Z")
I have a case with requirements for Pset\_SoundGeneration/SoundCurve, which is an IfcPropertyTableValue. The table consists of data for frequencies and sound pressures - hence two datatypes (IfcFrequencyMeasure and IfcSou… --- ## [Using IDS to Validate Property Attributes](https://forums.buildingsmart.org/t/using-ids-to-validate-property-attributes/5736)
**Author:** [@shihangzhang](https://forums.buildingsmart.org/u/shihangzhang)\ **Replies:** 1\ **Last updated:** [November 4, 2024, 9:38am UTC](https://forums.buildingsmart.org/t/using-ids-to-validate-property-attributes/5736 "2024-11-04T09:38:06Z")
Hello everyone, I’m wondering if it’s possible to validate property attributes using IDS. For example, I’d like to check the attribute “People” within the Pset\_SpaceThermalLoad of an IfcBuilding, which is expressed usi… --- ## [Glazing information for curtain wall panels](https://forums.buildingsmart.org/t/glazing-information-for-curtain-wall-panels/5727)
**Author:** [@Moult](https://forums.buildingsmart.org/u/Moult)\ **Replies:** 0\ **Last updated:** [November 1, 2024, 2:43am UTC](https://forums.buildingsmart.org/t/glazing-information-for-curtain-wall-panels/5727 "2024-11-01T02:43:47Z")
It had always been “the way” in IFC such that the glazing panel in a curtain wall was classified as an IfcPlate.CURTAIN\_PANEL. However I’m increasingly questioning this. I’ve been recently working a lot with trying to d… --- ## [We have a problem with IfcMapConversion](https://forums.buildingsmart.org/t/we-have-a-problem-with-ifcmapconversion/5695)
**Author:** [@NickMein](https://forums.buildingsmart.org/u/NickMein)\ **Replies:** 2\ **Last updated:** [November 1, 2024, 2:31am UTC](https://forums.buildingsmart.org/t/we-have-a-problem-with-ifcmapconversion/5695 "2024-11-01T02:31:45Z")
Hi all, we (the BIM industry) have a problem with IfcMapConversion. Or actually two problems: We’ve seen two examples recently of software that is writing IfcMapConversion incorrectly. Specifically, in both cases, proj… --- ## [Is certification a "snapshot in time" or is it renewed?](https://forums.buildingsmart.org/t/is-certification-a-snapshot-in-time-or-is-it-renewed/4862)
**Author:** [@stefkeB](https://forums.buildingsmart.org/u/stefkeB)\ **Replies:** 8\ **Last updated:** [October 28, 2024, 7:40am UTC](https://forums.buildingsmart.org/t/is-certification-a-snapshot-in-time-or-is-it-renewed/4862 "2024-10-28T07:40:19Z")
Looking at the Software Certification page, we can read that e.g. Revit received certification for IFC2x3 in 2013. Here is the report for IFC 2x3 CV2.0 export, which was assigned to Revit 2013 https://ifc2x3.b-cert.o… --- ## [IFC for Road Signage](https://forums.buildingsmart.org/t/ifc-for-road-signage/5687)
**Author:** [@Joel](https://forums.buildingsmart.org/u/Joel)\ **Replies:** 3\ **Last updated:** [October 23, 2024, 3:41pm UTC](https://forums.buildingsmart.org/t/ifc-for-road-signage/5687 "2024-10-23T15:41:49Z")
Hoping this is the correct category for this. I’m looking into the exporting of IFC files for Road Signage and it’s associated posts and footings. So far I’m exporting the sign plate as the IfcEntity: IfcSign. And als… --- ## [ISO 7817-3 (under development) and IDS](https://forums.buildingsmart.org/t/iso-7817-3-under-development-and-ids/5533)
**Author:** [@daviddelven](https://forums.buildingsmart.org/u/daviddelven)\ **Replies:** 6\ **Last updated:** [October 23, 2024, 1:52pm UTC](https://forums.buildingsmart.org/t/iso-7817-3-under-development-and-ids/5533 "2024-10-23T13:52:01Z")
Given that ‘ISO 7817 Part 3 will be a standard on a schema to enable a machine-readable definition of the level of information need framework’, has bSI ever mentioned a connection with the IDS standard? Recently, @berlo… --- ## [IfcStructuralElementsDomain Schema types: IfcPile or IfcFooting vs IfcColumn or IfcSlab](https://forums.buildingsmart.org/t/ifcstructuralelementsdomain-schema-types-ifcpile-or-ifcfooting-vs-ifccolumn-or-ifcslab/1375)
**Author:** [@daviddelven](https://forums.buildingsmart.org/u/daviddelven)\ **Replies:** 7\ **Last updated:** [October 21, 2024, 7:56am UTC](https://forums.buildingsmart.org/t/ifcstructuralelementsdomain-schema-types-ifcpile-or-ifcfooting-vs-ifccolumn-or-ifcslab/1375 "2024-10-21T07:56:59Z")
Hello, Is there any main difference, from the perspective of geometry types, between some types of the IfcStructuralElementsDomain Schema, such as IfcPile of IfcFooting in comparison to similar types of the IfcSharedBui… --- ## [Construction Room](https://forums.buildingsmart.org/t/construction-room/3363)
**Author:** [@JonProctor](https://forums.buildingsmart.org/u/JonProctor)\ **Replies:** 2\ **Last updated:** [October 3, 2024, 1:57pm UTC](https://forums.buildingsmart.org/t/construction-room/3363 "2024-10-03T13:57:11Z")
Hello and welcome to the new Construction Room forum. --- ## [Visualization of BCF Issues on IFC Models](https://forums.buildingsmart.org/t/visualization-of-bcf-issues-on-ifc-models/5668)
**Author:** [@JoëlM](https://forums.buildingsmart.org/u/Jo%C3%ABlM)\ **Replies:** 2\ **Last updated:** [September 30, 2024, 9:24am UTC](https://forums.buildingsmart.org/t/visualization-of-bcf-issues-on-ifc-models/5668 "2024-09-30T09:24:15Z")
--- ## [IDS and Federated IFC file](https://forums.buildingsmart.org/t/ids-and-federated-ifc-file/5654)
**Author:** [@RenzoVenuti](https://forums.buildingsmart.org/u/RenzoVenuti)\ **Replies:** 4\ **Last updated:** [September 26, 2024, 2:18pm UTC](https://forums.buildingsmart.org/t/ids-and-federated-ifc-file/5654 "2024-09-26T14:18:56Z")
Since there is the possibility of federating the various ifc models in a single IFC file, I believe the need will arise to unite all the various ids that validate the various models that make up the federated model. Is t… --- ## [Why time series for performance data?](https://forums.buildingsmart.org/t/why-time-series-for-performance-data/5538)
**Author:** [@nickger](https://forums.buildingsmart.org/u/nickger)\ **Replies:** 6\ **Last updated:** [September 24, 2024, 8:00am UTC](https://forums.buildingsmart.org/t/why-time-series-for-performance-data/5538 "2024-09-24T08:00:52Z")
Hi, I could not find anywhere an explanation of how IFC is supposed to store performance set points. Almost all performance parameters are preserved for operation phase and store historical data (which no one software s… --- ## [IFCPROPERTYSINGLEVALUE Name & Nominal Value Updation based on GlobalId - Shared / Not Shared](https://forums.buildingsmart.org/t/ifcpropertysinglevalue-name-nominal-value-updation-based-on-globalid-shared-not-shared/5634)
**Author:** [@Vijay](https://forums.buildingsmart.org/u/Vijay)\ **Replies:** 0\ **Last updated:** [September 4, 2024, 10:39am UTC](https://forums.buildingsmart.org/t/ifcpropertysinglevalue-name-nominal-value-updation-based-on-globalid-shared-not-shared/5634 "2024-09-04T10:39:20Z")
Dear Experts, I am a beginner and doubt on updating of Nominal Value with Name “SKIFCEPMSTATUS” #187= IFCPROPERTYSINGLEVALUE(‘SKIFCEPMSTATUS’,$,IFCLABEL(‘erected’),$); //create instance for new ifc file IfcStore MyIF… --- ## [What ever happened to Anootation related classes](https://forums.buildingsmart.org/t/what-ever-happened-to-anootation-related-classes/5620)
**Author:** [@adishavit](https://forums.buildingsmart.org/u/adishavit)\ **Replies:** 7\ **Last updated:** [September 1, 2024, 1:29pm UTC](https://forums.buildingsmart.org/t/what-ever-happened-to-anootation-related-classes/5620 "2024-09-01T13:29:50Z")
Hi, When trying to represent architectural drawings, I was going over the IFC docs. In Ifc 2x3 there were various classes like: IfcDimensionCurve, IfcDraughtingCallout, IfcLinearDimension, IfcDimensionPair etc. Where … --- ## [Proposal for a new bSDD API](https://forums.buildingsmart.org/t/proposal-for-a-new-bsdd-api/5598)
**Author:** [@YoshiyukiMiyauchi](https://forums.buildingsmart.org/u/YoshiyukiMiyauchi)\ **Replies:** 3\ **Last updated:** [August 23, 2024, 10:12am UTC](https://forums.buildingsmart.org/t/proposal-for-a-new-bsdd-api/5598 "2024-08-23T10:12:13Z")
Class API Method: GET /api/Class/RelatedIFC/v1 API Description By setting the dictionary’s URI and the value of Related IFC entities to arguments, a list of classes with a specific IFC Entity can be obtained. Parame… --- ## [Writing IFC - no success with IfcSurfaceCurveSweptAreaSolid](https://forums.buildingsmart.org/t/writing-ifc-no-success-with-ifcsurfacecurvesweptareasolid/5586)
**Author:** [@Norbert](https://forums.buildingsmart.org/u/Norbert)\ **Replies:** 2\ **Last updated:** [August 21, 2024, 12:12pm UTC](https://forums.buildingsmart.org/t/writing-ifc-no-success-with-ifcsurfacecurvesweptareasolid/5586 "2024-08-21T12:12:09Z")
Dear community, I’m writing an IFC export interface class for a metal stair design software which runs well regarding all straight profiles and bended parts using C#. But I’m struggling since days with generating parts… --- ## [bSDD translated dictionary does show translated Description](https://forums.buildingsmart.org/t/bsdd-translated-dictionary-does-show-translated-description/5552)
**Author:** [@MennoMekes](https://forums.buildingsmart.org/u/MennoMekes)\ **Replies:** 3\ **Last updated:** [August 21, 2024, 11:46am UTC](https://forums.buildingsmart.org/t/bsdd-translated-dictionary-does-show-translated-description/5552 "2024-08-21T11:46:31Z")
Hi, does someone know why the translated Descriptions in the dictionary are not showing? in the picture below: 1: original Dutch dictionary header 2: translated dictionary header 3: Description in Dutch in the bSDD … --- ## [bSDD - buildingSMART Data Dictionary and classification of IFC 4x3 Domain mapping?](https://forums.buildingsmart.org/t/bsdd-buildingsmart-data-dictionary-and-classification-of-ifc-4x3-domain-mapping/4854)
**Author:** [@elva](https://forums.buildingsmart.org/u/elva)\ **Replies:** 10\ **Last updated:** [August 14, 2024, 12:06pm UTC](https://forums.buildingsmart.org/t/bsdd-buildingsmart-data-dictionary-and-classification-of-ifc-4x3-domain-mapping/4854 "2024-08-14T12:06:08Z")
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 bi… --- ## [PropertySets of IfcSpace](https://forums.buildingsmart.org/t/propertysets-of-ifcspace/3997)
**Author:** [@ElisEck](https://forums.buildingsmart.org/u/ElisEck)\ **Replies:** 9\ **Last updated:** [August 14, 2024, 5:33am UTC](https://forums.buildingsmart.org/t/propertysets-of-ifcspace/3997 "2024-08-14T05:33:44Z")
The IfcSpace entity contains numerous PropertySets which are either defined on the entity itself or which it inherits. In the field of thermal load there are 5 PropertySets defined at the space and two more inherited fro… --- ## [Is "IFC 4.3" officially a change in the naming schema?](https://forums.buildingsmart.org/t/is-ifc-4-3-officially-a-change-in-the-naming-schema/5446)
**Author:** [@AntonioCWD](https://forums.buildingsmart.org/u/AntonioCWD)\ **Replies:** 2\ **Last updated:** [August 9, 2024, 2:13pm UTC](https://forums.buildingsmart.org/t/is-ifc-4-3-officially-a-change-in-the-naming-schema/5446 "2024-08-09T14:13:10Z")
According to the list of all IFC versions (see ifc schema specifications) from version 2.0.0.0 up to version 4.2.0.0 “IFC” and the proceding short-version were written without a delimiting space: IFC2x3, IFC4, IFC4.2. V… [Previous page](https://forums.buildingsmart.org/latest.md?page=2) [Next page](https://forums.buildingsmart.org/latest.md?page=4)