Issues

• Add Concept Template 'Alignment Geometry - Reusing Horizontal Layout' in 4.4

  before-NWI
  buildingSMART/IFC4.x-development#1220 · Filter by author civilx64 opened on Oct 8, 2026

• Inconsistency between IfcObject.UniquePropertySetNames documentation and EXPRESS definition

  buildingSMART/IFC4.x-development#1217 · Filter by author tkato2024 opened on Oct 6, 2026
  2

• Ambiguity with Openings in Element Decomposition (IfcWall + IfcCovering)

  buildingSMART/IFC4.x-development#1212 · Filter by author SamiLyden opened on Oct 5, 2026
  1

• PEnum_ElectronicFilterType: BANDPASSFLITER is misspelled

  buildingSMART/IFC4.x-development#1209 · Filter by author janbrouwer opened on Oct 1, 2026

• Remove confusing override sentence on IfcCompositeCurveSegment docs

  before-NWI
  buildingSMART/IFC4.x-development#1194 · Filter by author aothms opened on Sep 28, 2026

• IfcConversionBasedUnitWithOffset: Fahrenheit example contradicts the ConversionOffset definition

  buildingSMART/IFC4.x-development#1193 · Filter by author GeneralPawz opened on Sep 26, 2026

• List of elements marked as deprecated only in text

  before-NWIiso-compatibility
  buildingSMART/IFC4.x-development#1190 · Filter by author aothms opened on Sep 24, 2026

• IfcFurnishingElementType says it should be deprecated

  after-NWIiso-Te
  buildingSMART/IFC4.x-development#1188 · Filter by author Moult opened on Sep 24, 2026
  1

• Documentation - Tags showing as Plain Text

  after-NWIiso-Ed
  buildingSMART/IFC4.x-development#1173 · Filter by author joepaddock-uk opened on Sep 8, 2026
  3

  

• documentation bug: Annex D an Annex F are empty

  after-NWIiso-Ge
  buildingSMART/IFC4.x-development#1171 · Filter by author mheusch-trimble opened on Sep 7, 2026
  2

  

• Proposal for extending Pset_DoorCommon with a property HasHoldOpenDevice

  allocatedallocated-buildingifc-update-out
  buildingSMART/IFC4.x-development#1167 · Filter by author Wilt opened on Aug 14, 2026

• IfcCardinalPointReference example

  buildingSMART/IFC4.x-development#1165 · Filter by author SamiLyden opened on Aug 5, 2026
  5

• Pset_DistributionBoardTypeCommon applicability requires deprecated entity type

  4.4before-NWI
  buildingSMART/IFC4.x-development#1158 · Filter by author civilx64 opened on Jul 15, 2026

• Proposal to remove IfcPropertySetDefinitionSelect / IfcPropertySetDefinitionSet

  after-NWIiso-compatibility
  buildingSMART/IFC4.x-development#1157 · Filter by author Moult opened on Jul 13, 2026
  2

• Pset_ConcreteElementGeneral should be applicable to IfcKerb

  4.4before-NWI
  buildingSMART/IFC4.x-development#1152 · Filter by author civilx64 opened on Jul 6, 2026
  2

• Towards a common understanding of IfcLinearPlacement, IfcAxis2PlacementLinear, IfcPointByDistanceExpression, IfcOffsetCurveByDistances, IfcSectionedSurface, and IfcSectionedSolidHorizontal

  ( ! )before-NWIIF
  buildingSMART/IFC4.x-development#1151 · Filter by author RickBrice opened on Jul 2, 2026
  19

  

• Proposed changes to IfcGridPlacement and IfcLinearPlacement

  before-NWIIF
  buildingSMART/IFC4.x-development#1142 · Filter by author evandroAlfieri opened on Jun 16, 2026

• IfcElementAssembly issue on Rail domain components

  ifc-update-out
  buildingSMART/IFC4.x-development#1141 · Filter by author JudicaelDehotinAd opened on Jun 10, 2026
  6

• Qto_SlabBaseQuantities: Rename Width to Thickness to avoid confusion with Depth

  after-NWIiso-compatibilityiso-Te
  buildingSMART/IFC4.x-development#1089 · Filter by author IO10101 opened on May 13, 2026
  1

• IfcConstraint Usage for As-built/complete models

  ifc-update-out
  buildingSMART/IFC4.x-development#1088 · Filter by author joepaddock-uk opened on May 6, 2026

• Status in Pset_ProvisionForVoid

  ifc-update-outlegacy
  buildingSMART/IFC4.x-development#1086 · Filter by author MennoMekes opened on Apr 28, 2026
  3

• datatype "IfcPressureMeasure" for "SecondaryAirFlowRateRange"

  after-NWIiso-compatibilityiso-Te
  buildingSMART/IFC4.x-development#1084 · Filter by author IO10101 opened on Apr 21, 2026

• datatype "IfcLabel" for Property "ProductionYear"

  after-NWIiso-compatibilityiso-Te
  buildingSMART/IFC4.x-development#1083 · Filter by author IO10101 opened on Apr 21, 2026

• IfcGradient.md is empty

  after-NWIiso-Ed
  buildingSMART/IFC4.x-development#1082 · Filter by author evandroAlfieri opened on Apr 21, 2026
  

• Duplicate documentation for five functions

  after-NWIiso-Ed
  buildingSMART/IFC4.x-development#1081 · Filter by author evandroAlfieri opened on Apr 21, 2026