Issues

• Error in AbV specification - IfcConnectionGeometry child classes excluded from AbV

  after-NWIagreementdocumentationIF
  buildingSMART/IFC4.x-IF#180 · Filter by author RickBrice opened on Aug 1, 2026
  2

• IfcTransitionCode illustration error?

  after-NWIIF
  buildingSMART/IFC4.x-IF#179 · Filter by author RickBrice opened on May 7, 2026
  1

• Accepted interpretation of IfcQuantityWeight.WeightValue

  before-NWIIF
  buildingSMART/IFC4.x-IF#178 · Filter by author RickBrice opened on Apr 23, 2026
  6

• Question to Implementers - Is there such a thing as too many IFCALIGNMENTS ?

  help wanted
  buildingSMART/IFC4.x-IF#176 · Filter by author gmn3DS opened on Mar 4, 2026
  2

• Alignment-atomic-testset are invalid and obsolete

  buildingSMART/IFC4.x-IF#174 · Filter by author I-Sokolov opened on Sep 30, 2025
  8

• Question about IfcDistributionSystem

  help wanted
  buildingSMART/IFC4.x-IF#173 · Filter by author SoftwareMechanic opened on Apr 24, 2025
  2

• Draft IfcAlignment Implementation Guide - Request for feedback

  help wanted
  buildingSMART/IFC4.x-IF#169 · Filter by author RickBrice opened on Dec 13, 2024
  32

• Request for Official Schema Update Regarding IfcSpatialZone

  buildingSMART/IFC4.x-IF#168 · Filter by author daviddelven opened on Nov 19, 2024
  4

• IFC4X3_ADD2 Documentation - IfcSpace definition refers to deprecated attributes

  after-NWIdocumentationIF
  buildingSMART/IFC4.x-IF#150 · Filter by author gmn3DS opened on Apr 10, 2024
  

• Documentation error in IfcSectionedSolidHorizontal

  before-NWIdocumentationIF
  buildingSMART/IFC4.x-IF#147 · Filter by author RickBrice opened on Mar 21, 2024
  

• Hand calculations suggest equations for polynomial spirals are not documented accurately.

  documentation
  buildingSMART/IFC4.x-IF#146 · Filter by author RickBrice opened on Feb 23, 2024
  8

  

• Missing concept template or IfcAlignment documentation needs revision

  before-NWIdocumentationIF
  buildingSMART/IFC4.x-IF#140 · Filter by author RickBrice opened on Jan 11, 2024
  7

  

• Can Products with Linear placement be IfcRelContainedInSpatialStructure

  before-NWIIFstale-no-activity
  buildingSMART/IFC4.x-IF#123 · Filter by author eihov opened on Nov 9, 2023
  2

• Geometry of geotechnical stratum

  help wanted
  buildingSMART/IFC4.x-IF#28 · Filter by author Olivier-Berrier opened on Apr 14, 2023
  4

  

• Testing encoding and exports of units and IfcReal values

  buildingSMART/IFC4.x-IF#27 · Filter by author jwouellette opened on Apr 3, 2023

• Add examples for IfcLogical that show proper syntax for IFC files

  after-NWIIF
  buildingSMART/IFC4.x-IF#24 · Filter by author AngelVelezSosa opened on Jan 17, 2023
  1

• Suggestion to use .ifczip extension rather than .zip

  buildingSMART/IFC4.x-IF#6 · Filter by author jmirtsch opened on Sep 16, 2022
  2