Sync ifc4.3-main into ifc4.4-main by Ghesselink · Pull Request #1216 · buildingSMART/IFC4.x-development

Ghesselink · 2026-10-05T23:08:15Z

One merge commit that brings everything from ifc4.3-main into ifc4.4-main: 74 commits, 42 of which 4.4 already had as cherry-picked copies.

From here on ifc4.3-main is an ancestor of ifc4.4-main (git merge-base --is-ancestor), so "is everything from 4.3 in 4.4?" is answered.

Tested on fork: https://ifc44-docs.geerthesselink.com/IFC/PREVIEW/sync-43-into-44/

closes #494

Clarified default placement behavior for Axis and RefDirection attributes.

Clarified default placement behavior and added reference to _IfcBuildAxes_ function.

closes buildingSMART/IFC4.x-IF#152 Removed explanation of SegmentStart and SegmentLength.

Clarify Helmert Transition Segment CT by removing unnecessary details closes buildingSMART/IFC4.x-IF#152

Clarify default placement behavior for Axis and RefDirection

thanks Thomas Co-authored-by: Thomas Krijnen <t.krijnen@gmail.com>

Commit 6a61bfe split the schema into per-domain .uml files and dropped the EA stereotype/tag layer that to_bsdd.py relied on. Resolve entity children, supertypes and attribute/predefined/defined types via ownedAttribute/node.resolve; detect quantity sets by name; guard fields removed upstream (deprecated, super_verbatim). Also strip EXPRESS aggregation bounds (_L[..]) from property code and name, make name_improve return its computed value, and take the short definition by splitting on the  marker.

… the 4.3 MVDs

Co-authored-by: Thomas Krijnen <t.krijnen@gmail.com>

…ntLinear-Axis-defaults clarify default directions for IfcAxis2PlacementLinear.Axis

ifc-uml modelling guide

Fix bSDD export for modularized XMI schema

Updated README to reflect the latest IFC 4.3.2.0 release and development version details.

The docs are published under a sub-path (e.g. /IFC/DEV/IFC4_4/HTML/), but the search index was requested from /assets/search/search-index.json and result links used the index' absolute paths, so both resolved against the domain root and 404'd. Add a #site-root link element, which the refiner already relativises per page depth, and derive both URLs from it. (cherry picked from commit f84064d)

…ion.

…small-fixes-43 Fixes to changelog mvd-listing various (onto 4.3)

Update logo

…earches

Minor changes

Natural-language name extraction for bSDD and translation output

Postfix draft schema names with level and date (4.3)

Point site links at the current repo and branch

github-actions · 2026-10-05T23:18:06Z

PR Validation -- schema generators

Checks:

✓ EXPRESS schema valid
✓ New entities present in structure.json
✓ MD docs for new entities
✓ PEnum convention
✓ New UML Psets/Qtos emitted
✓ Modified psets emitted
✓ Schema SHACL validation

Detected:

New entities: (none)
New PEnums: (none)
New UML Psets/Qtos: (none)
UML files changed: (none)
MD docs changed: (none)

📋 EXPRESS schema diff (baseline vs PR head)

Express schema differences

0 items

Missing data

🎉 No issues 🎉

Type definitions

🎉 No issues 🎉

Entity definitions

🎉 No issues 🎉

Constraints

🎉 No issues 🎉

SHACL validation report

DefinitionForEnumLiteral

The resource 'IfcBridgePartTypeEnum.SURFACESTRUCTURE' has no definition
The resource 'IfcRailwayPartTypeEnum.DILATIONTRACK' has no definition

DefinitionForPropertyOrQuantity

The Property 'Pset_AirSideSystemInformation.AirFlowSensible' has no definition
The Property 'Pset_AirSideSystemInformation.TotalAirFlow' has no definition
The Property 'Pset_AirTerminalBoxPHistory.AirFlowCurve' has no definition
The Property 'Pset_AirTerminalOccurrence.AirFlowType' has no definition
The Property 'Pset_AirToAirHeatRecoveryTypeCommon.PrimaryAirFlowRateRange' has no definition
The Property 'Pset_AirToAirHeatRecoveryTypeCommon.SecondaryAirFlowRateRange' has no definition
The Property 'Pset_SpaceThermalPHistory.ExhaustAirFlowRate' has no definition
The Property 'Qto_WallBaseQuantities.GrossFootPrintArea' has no definition
The Property 'Qto_WallBaseQuantities.NetFootPrintArea' has no definition

DefinitionForResource

The resource 'IfcSurfaceFeature' has no definition
The resource 'IfcURIReference' has no definition

LeafEntityHasPredefinedType

Leaf IfcObject 'IfcAlignmentCant' has no PredefinedType attribute
Leaf IfcObject 'IfcAlignmentHorizontal' has no PredefinedType attribute
Leaf IfcObject 'IfcAlignmentSegment' has no PredefinedType attribute
Leaf IfcObject 'IfcAlignmentVertical' has no PredefinedType attribute
Leaf IfcObject 'IfcAsset' has no PredefinedType attribute
Leaf IfcObject 'IfcBorehole' has no PredefinedType attribute
Leaf IfcObject 'IfcBuilding' has no PredefinedType attribute
Leaf IfcObject 'IfcBuildingStorey' has no PredefinedType attribute
Leaf IfcObject 'IfcCivilElement' has no PredefinedType attribute
Leaf IfcObject 'IfcDistributionCircuit' has no PredefinedType attribute
Leaf IfcObject 'IfcGeomodel' has no PredefinedType attribute
Leaf IfcObject 'IfcGeoslice' has no PredefinedType attribute
Leaf IfcObject 'IfcSite' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralCurveConnection' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralCurveMemberVarying' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralLinearAction' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralLoadCase' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralPlanarAction' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralPointAction' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralPointConnection' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralPointReaction' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralResultGroup' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralSurfaceConnection' has no PredefinedType attribute
Leaf IfcObject 'IfcStructuralSurfaceMemberVarying' has no PredefinedType attribute
Leaf IfcObject 'IfcWallStandardCase' has no PredefinedType attribute
Leaf IfcObject 'IfcZone' has no PredefinedType attribute

PropertyForDefinition

For document 'AcidityConcentration.md/a/properties/docs' a property cannot be found
For document 'ActualWork.md/a/properties/docs' a property cannot be found
For document 'AdjustmentRange.md/a/properties/docs' a property cannot be found
For document 'AdjustmentRangeStepValue.md/a/properties/docs' a property cannot be found
For document 'AdjustmentValues.md/a/properties/docs' a property cannot be found
For document 'AdmixturesDescription.md/a/properties/docs' a property cannot be found
For document 'AffectsSurroundings.md/a/properties/docs' a property cannot be found
For document 'Aggregation.md/a/properties/docs' a property cannot be found
For document 'AirflowCurve.md/a/properties/docs' a property cannot be found
For document 'AirflowSensible.md/a/properties/docs' a property cannot be found
For document 'AirflowType.md/a/properties/docs' a property cannot be found
For document 'AlkalinityConcentration.md/a/properties/docs' a property cannot be found
For document 'AppearanceGrade.md/a/properties/docs' a property cannot be found
For document 'ApplicableStructuralDesignMethod.md/a/properties/docs' a property cannot be found
For document 'Area.md/a/properties/docs' a property cannot be found
For document 'Arrangement.md/a/properties/docs' a property cannot be found
For document 'AssessmentOfRisk.md/a/properties/docs' a property cannot be found
For document 'BaseChamfer.md/b/properties/docs' a property cannot be found
For document 'BearingStrength.md/b/properties/docs' a property cannot be found
For document 'BoilingPoint.md/b/properties/docs' a property cannot be found
For document 'BottomCover.md/b/properties/docs' a property cannot be found
For document 'CO2Content.md/c/properties/docs' a property cannot be found
For document 'COContent.md/c/properties/docs' a property cannot be found
For document 'CarbonContent.md/c/properties/docs' a property cannot be found
For document 'CenterCoreBaseHeight.md/c/properties/docs' a property cannot be found
For document 'CenterCoreBaseWidth.md/c/properties/docs' a property cannot be found
For document 'CenterCoreMiddleHeight.md/c/properties/docs' a property cannot be found
For document 'CenterCoreSpacing.md/c/properties/docs' a property cannot be found
For document 'CenterCoreTopHeight.md/c/properties/docs' a property cannot be found
For document 'CenterCoreTopWidth.md/c/properties/docs' a property cannot be found
For document 'CentreOfGravityInX.md/c/properties/docs' a property cannot be found
For document 'CentreOfGravityInY.md/c/properties/docs' a property cannot be found
For document 'CombustionTemperature.md/c/properties/docs' a property cannot be found
For document 'CompStrength.md/c/properties/docs' a property cannot be found
For document 'CompStrengthPerp.md/c/properties/docs' a property cannot be found
For document 'CompactedVolume.md/c/properties/docs' a property cannot be found
For document 'CompressiveStrength.md/c/properties/docs' a property cannot be found
For document 'ConcealedFlooringOffset.md/c/properties/docs/README.md/resource/schemas' a property cannot be found
For document 'Condition.md/c/properties/docs' a property cannot be found
For document 'CoreBaseHeight.md/c/properties/docs' a property cannot be found
For document 'CoreBaseWidth.md/c/properties/docs' a property cannot be found
For document 'CoreMiddleHeight.md/c/properties/docs' a property cannot be found
For document 'CoreSpacing.md/c/properties/docs' a property cannot be found
For document 'CoreTopHeight.md/c/properties/docs' a property cannot be found
For document 'CoreTopWidth.md/c/properties/docs' a property cannot be found
For document 'Count.md/c/properties/docs' a property cannot be found
For document 'CrossSectionArea.md/c/properties/docs' a property cannot be found
For document 'CurrentCarryingCapasity.md/c/properties/docs' a property cannot be found
For document 'DefinitionType.md/d/properties/docs' a property cannot be found
For document 'DimensionalChangeCoefficient.md/d/properties/docs' a property cannot be found
For document 'DissolvedSolidsContent.md/d/properties/docs' a property cannot be found
For document 'DraftBaseOffset.md/d/properties/docs' a property cannot be found
For document 'DraftSideOffset.md/d/properties/docs' a property cannot be found
For document 'DynamicViscosity.md/d/properties/docs' a property cannot be found
For document 'EavesHeight.md/e/properties/docs' a property cannot be found
For document 'EdgeDraft.md/e/properties/docs' a property cannot be found
For document 'ExhaustAirFlowRate.md/e/properties/docs' a property cannot be found
For document 'Exponent.md/e/properties/docs' a property cannot be found
For document 'FinishCeilingHeight.md/f/properties/docs' a property cannot be found
For document 'FinishFloorHeight.md/f/properties/docs' a property cannot be found
For document 'FlangeBaseFillet.md/f/properties/docs' a property cannot be f

SHACL report truncated -- full report in the workflow artifact bundle.

_{See workflow run for failure details.}

aothms · 2026-10-06T08:59:30Z

As mentioned, propose a quick call to see if it's not cleaner to just start over with ifc4.4-main

evandroAlfieri and others added 30 commits April 23, 2026 01:17

add ifc-uml modelling guide

760d62e

update modelling guide

83a36c7

correct select types and predefined types applicability

68390d0

Clarify default placement behavior for Axis and RefDirection

9f71d1e

closes #494

Update IfcAxis2Placement3D.md with placement details

f571f8d

Clarified default placement behavior for Axis and RefDirection attributes.

Update IfcAxis2Placement3D documentation

65070f5

Clarified default placement behavior and added reference to _IfcBuildAxes_ function.

clarify default directions for IfcAxis2PlacementLinear.Axis

1c2686f

clarify default directions for IfcAxis2PlacementLinear.Axis

c77316e

clarify default directions for IfcAxis2PlacementLinear.Axis

d19bfc2

Clarify README by removing unnecessary details

a802815

closes buildingSMART/IFC4.x-IF#152 Removed explanation of SegmentStart and SegmentLength.

clarify default directions for IfcAxis2PlacementLinear.Axis

5bfd643

Merge pull request #1119 from buildingSMART/IF-curvesdocs-patch-1

4307ff4

Clarify Helmert Transition Segment CT by removing unnecessary details closes buildingSMART/IFC4.x-IF#152

Fix typo

987866b

Merge pull request #1116 from buildingSMART/IF-placement-patch

b46c86d

Clarify default placement behavior for Axis and RefDirection

Merge branch 'buildingSMART:ifc4.3-main' into ifc4.3-main

bb815a6

Apply suggestions from code review

227e808

thanks Thomas Co-authored-by: Thomas Krijnen <t.krijnen@gmail.com>

Adds color coding information

3f67a89

create utility script for generating a list of entities excluded from…

9af4244

… the 4.3 MVDs

Update code/determine_mvd_exclusions.py

ace93bf

Co-authored-by: Thomas Krijnen <t.krijnen@gmail.com>

use full name for 4.3 schema version

1c5a217

Merge pull request #1118 from civilx64/civilx64-patch-IfcAxis2Placeme…

c209f10

…ntLinear-Axis-defaults clarify default directions for IfcAxis2PlacementLinear.Axis

Merge pull request #1149 from evandroAlfieri/ifc4.3-main

60a6175

ifc-uml modelling guide

Update path and repository references

23fd321

Merge branch 'buildingSMART:ifc4.3-main' into ifc4.3-main

348cc0c

Merge pull request #1150 from janbrouwer/ifc4.3-main

33031cb

Fix bSDD export for modularized XMI schema

update version

72f68b3

Revise README for IFC 4.3.2.0 specifications

63e1f93

Updated README to reflect the latest IFC 4.3.2.0 release and development version details.

aothms and others added 24 commits September 17, 2026 21:45

Fetch latest ifcopenshell 0.8 with updated mvd

9f3e95d

Load data into html generator when available

99a4bab

Read deprecated entities and supertype mapping from structure.json

e1201c0

Computer generated UML diagrams are no longer part of this specificat…

e64c84c

…ion.

Fix publish pipeline and restore full MVD scope

cb99fb8

Cache EXPRESS parse results between publish runs

48027e9

Merge pull request #1183 from buildingSMART/tfk-changelog-mvdlisting-…

0860211

…small-fixes-43 Fixes to changelog mvd-listing various (onto 4.3)

Update logo

4474d61

Merge pull request #1186 from buildingSMART/ifc4.3-new-logo

f235be1

Update logo

Prevent self-links; skip <h1>

f9a5eeb

Hide sidebar search form on search page

4d701b4

Process form action in JS and retain index in-memory for subsequent s…

a821644

…earches

Merge pull request #1191 from buildingSMART/minor-changes

6754caa

Minor changes

Postfix draft schema names with level and date

60f2142

Point site links at the current repo and branch

60bc6e8

Same link fix on all branches; keep taxonomy link

aeb9bad

Tidy imports in xmi_document

f01efe0

Take repo branch from version.py; crop figure caption

7adda95

Drop sys.path lines; version is importable

9be1b8b

Take repo name from version.py as well

23bea5e

Merge pull request #1180 from janbrouwer/name-improve-wordninja

fbc3935

Natural-language name extraction for bSDD and translation output

Merge pull request #1200 from buildingSMART/schema-name-postfix-43

aa87cac

Postfix draft schema names with level and date (4.3)

Merge pull request #1201 from buildingSMART/fix-repo-links-43

9b01a27

Point site links at the current repo and branch

Merge ifc4.3-main into ifc4.4-main

548c86e

Ghesselink requested review from aothms, atomczak and evandroAlfieri October 5, 2026 23:46

evandroAlfieri approved these changes Oct 6, 2026

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Sync ifc4.3-main into ifc4.4-main - #1216

Sync ifc4.3-main into ifc4.4-main#1216
Ghesselink wants to merge 75 commits into
ifc4.4-mainfrom
sync/ifc4.3-main-into-ifc4.4-main

Ghesselink commented Oct 5, 2026 •

edited

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github-actions Bot commented Oct 5, 2026

Express schema differences

Missing data

Type definitions

Entity definitions

Constraints

DefinitionForEnumLiteral

DefinitionForPropertyOrQuantity

DefinitionForResource

LeafEntityHasPredefinedType

PropertyForDefinition

Uh oh!

aothms commented Oct 6, 2026

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github-actions Bot commented Oct 5, 2026

PR Validation -- schema generators

Express schema differences

Missing data

Type definitions

Entity definitions

Constraints

DefinitionForEnumLiteral

DefinitionForPropertyOrQuantity

DefinitionForResource

LeafEntityHasPredefinedType

PropertyForDefinition

Uh oh!

aothms commented Oct 6, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

7 participants

Ghesselink commented Oct 5, 2026 •

edited

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