IFC4.3.x-development
IFC4.3.x-development copied to clipboard
buildingSMART
Repository to collect updates to the IFC4.3 Specification
The _LifeCyclePhase_ occurs once as a property in Pset_EnvironmentalImpactIndicators (https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/Pset_EnvironmentalImpactIndicators.htm), taking ENUM as its value.  and also as an attribute on IfcPerformanceHistory (https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPerformanceHistory.htm) taking IfcLabel as value and having...
IfcGeometricRepresentationContext's TrueNorth attribute should be described as purely reference only
https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcGeometricRepresentationContext.htm says this: > The TrueNorth attribute should be provided, if the y axis of the WorldCoordinateSystem does not point to the global northing. Direction of the true north, or...
From the docs of IfcGeometricRepresentationContext: https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcGeometricRepresentationContext.htm > If an geographic placement is provided using [IfcMapConversion](https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcMapConversion.htm) then the WorldCoordinateSystem atttibute is used to define the offset between the zero point of...
Looking at concept templates [4.1.7.1.1.1 Alignment Geometry - Horizontal](https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Product_Shape/Product_Geometric_Representation/Alignment_Geometry/Alignment_Geometry_-_Horizontal/content.html) and [4.1.7.1.1.2 Alignment Geometry - Horizontal and Vertical](https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/concepts/Product_Shape/Product_Geometric_Representation/Alignment_Geometry/Alignment_Geometry_-_Horizontal_and_Vertical/content.html), the RepresentationIdentifier for the IfcCompositeCurve in the Horizontal case is `Axis` and it...
buildingSMART has long published this georeferencing guide: https://www.buildingsmart.org/wp-content/uploads/2020/02/User-Guide-for-Geo-referencing-in-IFC-v2.0.pdf This has long described the use of the scale parameter to store the average combined scale factor:  We have delivered many...
The usecase of IfcRigidOperation is to do a simple **translation** from A to B, most commonly when you truncate large coordinates. Yet FirstCoordinate and SecondCoordinate allow IfcPlaneAngleMeasure... but why? Lat...
It is possible that I need to go back to grad school, but I think there is one fundamental issue with a diagram on 7.1.3.2 IfcDoorPanelProperties. The door panel is...
IfcCountMeasure has been changed from NUMBER to INTEGER. This effectively breaks data format, and warrants a new major version bump.
I think we can have one IfcClassificationSelect TYPE IfcClassificationReferenceSelect = SELECT (IfcClassification ,IfcClassificationReference); END_TYPE; TYPE IfcClassificationSelect = SELECT (IfcClassification ,IfcClassificationReference); END_TYPE;
I think this is issue in schema, entity name must be in capital letters. ENTITY IfcPresentationLayerWithStyle SUBTYPE OF (IfcPresentationLayerAssignment); LayerOn : IfcLogical; LayerFrozen : IfcLogical; LayerBlocked : IfcLogical; LayerStyles :...
Metadata
Owner
Metadata
Repository to collect updates to the IFC4.3 Specification