| ARCHITECTURE LAYER |
New |
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Schema |
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Changed |
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affects P21 file --> |
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Entity / Function |
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Deleted |
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not upward compatible |
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Attribute / WR |
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Usage |
Change description |
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IfcGeometricConstraintResource |
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IfcPointOrVertexPoint |
x |
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New select type to enable connection between geometry and
topology |
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IfcCurveOrEdgeCurve |
x |
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New select type to enable connection between geometry and
topology |
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IfcSurfaceOrFaceSurface |
x |
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New select type to enable connection between geometry and
topology |
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IfcConnectionPointEccentricity |
x |
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New entity to support eccentricity between structural items |
x |
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EccentricityInX |
x |
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New attribute |
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EccentricityInY |
x |
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New attribute |
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EccentricityInZ |
x |
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New attribute |
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IfcConnectionPointGeometry |
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x |
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PointOnRelatedElement |
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x |
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attribute type changed to IfcPointOrVertexPoint |
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PointOnRelatingElement |
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x |
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attribute type changed to IfcPointOrVertexPoint |
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IfcConnectionCurveGeometry |
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x |
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PointOnRelatedElement |
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x |
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attribute type changed to IfcCurveOrEdgeCurve |
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PointOnRelatingElement |
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x |
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attribute type changed to IfcCurveOrEdgeCurve |
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IfcConnectionSurfaceGeometry |
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x |
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PointOnRelatedElement |
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x |
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attribute type changed to IfcSurfaceOrFaceSurface |
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PointOnRelatingElement |
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x |
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attribute type changed to IfcSurfaceOrFaceSurface |
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IfcGridAxis |
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(INV)PartOfU |
x |
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new inverse relationship to IfcGrid |
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(INV)PartOfV |
x |
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new inverse relationship to IfcGrid |
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(INV)PartOfW |
x |
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new inverse relationship to IfcGrid |
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(INV)HasIntersections |
x |
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new inverse relationship to IfcVirtualGridIntersection |
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IfcObjectPlacement |
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(INV) PlacesObjects |
x |
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new inverse relationship to IfcProduct |
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IfcGeometricModelResource |
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IfcBlock |
x |
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new entity to describe CSG primitives |
x |
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XLength |
x |
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new attribute |
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YLength |
x |
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new attribute |
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ZLength |
x |
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new attribute |
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IfcBooleanOperand |
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x |
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select enhanced to include IfcCsgPrimitive3D |
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IfcCsgSelect |
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x |
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select enhanced to include IfcCsgPrimitive3D |
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IfcCsgPrimitive3D |
x |
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new entity to describe CSG primitives |
x |
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Position |
x |
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new attribute |
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IfcPolygonalBoundedHalfSpace |
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PolygonalBoundary |
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x |
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attribute type changed to IfcBoundedCurve |
x |
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IfcRectangularPyramid |
x |
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new entity to describe CSG primitives |
x |
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XLength |
x |
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new attribute |
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YLength |
x |
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new attribute |
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Height |
x |
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new attribute |
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IfcRightCircularCylinder |
x |
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new entity to describe CSG primitives |
x |
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Height |
x |
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new attribute |
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Radius |
x |
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new attribute |
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IfcRightCircularCone |
x |
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new entity to describe CSG primitives |
x |
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Height |
x |
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new attribute |
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BottomRadius |
x |
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new attribute |
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IfcSphere |
x |
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new entity to describe CSG primitives |
x |
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Radius |
x |
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new attribute |
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IfcSweptAreaSolid |
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WR1 |
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x |
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rule deleted, derived profile can be used |
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IfcGeometryResource |
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IfcRepresentationItem |
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(INV) StyledByItem |
x |
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Inverse attribute added to access the presentation from
geometry |
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(INV) LayerAssignments |
x |
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Inverse attribute added to access the layer from geometry |
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IfcVectorDifference |
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x |
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function corrected |
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IfcMaterialResource |
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IfcMaterial |
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(INV) HasRepresentation |
x |
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Inverse attribute added to access the presentation from
material |
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IfcMeasureResource |
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IfcUnitAssignment |
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WR01 |
x |
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WR added to prevent duplicated units definitions |
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IfcCorrectUnitAssignment |
x |
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new function to secure non-duplicated unit assignments |
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IfcPresentationAppearanceResource |
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IfcBlobTexture |
x |
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New entity to have a pixel file included as a blob |
x |
x |
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IfcCharacterSpacingSelect |
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x |
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deleted, funtionality moved to IfcSizeSelect |
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x |
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IfcCharacterStyleSelect |
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x |
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select item changed from IfcColour to
IfcTextStyleForDefinedFont |
x |
x |
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IfcCurveStyle |
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x |
only global units are used and measures are given in target
plot scale |
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Name |
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x |
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deleted, now moved to supertype IfcPresentationStyle |
x |
x |
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WR11 |
x |
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WR added to enforce a positive length measure or 'by layer' |
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IfcCurveStyleFontPattern |
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VisibleSegmentLength |
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x |
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attribute type changed to IfcLengthMeasure |
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WR01 |
x |
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WR added to ensure a value >= 0. |
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IfcExternallyDefinedSurfaceStyle |
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x |
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correction of misspellt name IfcExternallyDefinedSufaceStyle |
x |
x |
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IfcFillAreaStyle |
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Name |
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x |
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deleted, now moved to supertype IfcPresentationStyle |
x |
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WR12 |
x |
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rule added to restrict externally defined hatch styles to one
instance |
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WR13 |
x |
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rule added to allow either external defined or internal
defined hatch styles |
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IfcFillAreaStyleHatching |
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PatternStart |
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x |
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attribute has been made optional |
x |
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PointOfReferenceHatchLine |
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x |
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attribute has been made optional |
x |
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WR21 |
x |
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rule added to control hatch line distance |
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WR22 |
x |
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rule added to enforce 2D point |
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WR23 |
x |
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rule added to enforce 2D point |
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IfcHatchLineDistanceSelect |
x |
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new SELECT item added |
x |
x |
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IfcPixelTexture |
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Pixel |
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x |
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Datatype changed to Binary for better encoding of the hex
values |
x |
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IfcPresentationStyle |
x |
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New abstract supertype |
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Name |
x |
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New attribute, promoted from subtypes |
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IfcSizeSelect |
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x |
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SELECT item IfcMeasureWithUnit removed, IfcDescriptiveMeasure
added |
x |
x |
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IfcStyledItem |
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Item |
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x |
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attribute made optional |
x |
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WR12 |
x |
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rule added to prevent an IfcStyledItem to style another
IfcStyledItem |
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IfcSurfaceStyle |
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Name |
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x |
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deleted, now moved to supertype IfcPresentationStyle |
x |
x |
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WR11 |
x |
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rule added |
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WR12 |
x |
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rule added |
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WR13 |
x |
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rule added |
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WR14 |
x |
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rule added |
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WR15 |
x |
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rule added |
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IfcSurfaceStyleWithTextures |
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Textures |
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x |
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aggregate changed to LIST |
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HasTextureCoordinates |
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x |
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inverse attribute deleted |
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IfcSymbolStyle |
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Name |
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x |
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deleted, now moved to supertype IfcPresentationStyle |
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IfcTextAlignment |
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x |
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definition and where rule changed at the defined type |
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IfcTextDecoration |
x |
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new defined type |
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IfcTextTransformation |
x |
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new defined type |
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IfcTextStyle |
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x |
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x |
x |
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Name |
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x |
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deleted, now moved to supertype IfcPresentationStyle |
x |
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TextFontStyle |
x |
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new attribute type:TextFontSelect added for reusable font
definiton |
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TextStyle |
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x |
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attribute TextStyles renamed intoTextStyle, now optional 0:1 |
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TextCharacterAppearance |
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x |
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attribute CharacterGlypphArearance renamed |
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IfcTextStyleSelect |
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x |
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removing IfcTextStyleWithMirror, adding IfcTextStyleModel |
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IfcTextStyleForDefinedFont |
x |
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new entity combining text color and background color |
x |
x |
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IfcTextStyleTextModel |
x |
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new entity to allow for text box and spacing definitions
following CSS model |
x |
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IfcTextStyleWithBoxCharacteristics |
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x |
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x |
x |
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CharacterSpacing |
x |
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new attribute |
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IfcTextStyleWithMirror |
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x |
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deleted, no occurrence specific information in reusable font
definition |
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x |
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IfcTextStyleWithSpacing |
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x |
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deleted, functionality moved to
IfcTextStyleWithBoxCharacteristics. |
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x |
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IfcTextureCoordinate |
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moved to IfcPresentationDefinitionResource schema |
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Texture |
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x |
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attribute Texture deleted |
x |
x |
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IfcPresentationDefinitionResource |
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IfcAnnotationCurveOccurrence |
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WR31 |
x |
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WR added (compliance with P46 original) |
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IfcAnnotationFillArea |
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Boundaries |
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x |
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attribute replaced by a differentiation of inner and outer
boundaries |
x |
x |
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OuterBoundary |
x |
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new attribute |
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InnerBoundaries |
x |
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new attribute |
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IfcAnnotationFillAreaOccurrence |
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FillStyleTarget |
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x |
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attribute made optional |
x |
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GlobalOrLocal |
x |
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new attribute to determine global or local origin for hatching |
x |
x |
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WR31 |
x |
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WR added (compliance with P46 original) |
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IfcAnnotationSurface |
x |
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New entity for solids and surfaces with texture coordinates |
x |
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TextureCoordinates |
x |
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New attribute to assign texture coordinates |
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IfcAnnotationSurfaceOccurrence |
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WR31 |
x |
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WR added (compliance with P46 original) |
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IfcAnnotationSymbolOccurrence |
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WR31 |
x |
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WR added (compliance with P46 original) |
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IfcAnnotationTextOccurrence |
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WR31 |
x |
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WR added (compliance with P46 original) |
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IfcBoxAlignment |
x |
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new defined type |
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IfcTextFontSelect |
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x |
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renamed from IfcFontSelect |
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IfcTextLiteral |
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x |
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Font |
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x |
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attribute Font deleted, now handled at IfcTextStyle |
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Alignment |
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x |
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deleted, moved down to subtype IfcTextliteralWithExtent |
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IfcTextLiteralWithExtent |
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x |
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Alignment |
x |
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new attribute, demoted from supertype IfcTextLiteral |
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WR31 |
x |
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WR added (disallow IfcPlanarBox for extent) |
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IfcTextureMap |
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TextureMaps |
x |
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New attribute to assign texture mapping |
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VertexBasedTextures |
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x |
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Attribute deleted |
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IfcVertexBasedTextureMap |
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VertexBasedGeometry |
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x |
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attribute deleted (moved to IfcTextureMap) |
x |
x |
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TexturePoints |
x |
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attribute added |
x |
x |
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TextureVertices |
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x |
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list changed from 1:? to 3:? |
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IfcPresentationDimensioningResource |
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IfcDimensionPair |
x |
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new entity |
x |
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IfcPresentationOrganisationResource |
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IfcAnnotationFillAreaOccurrence |
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FillStyleTarget |
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x |
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attribute made optional |
x |
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GlobalOrLocal |
x |
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attribute added |
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x |
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IfcPresentationLayerAssignment |
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Identifier |
x |
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added and promoted from subtype, was LayerNumber |
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IfcPresentationLayerWithStyle |
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x |
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remaned from IfcPresentationLayerAssignmentWithStyle |
x |
x |
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LayerNumber |
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x |
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promoted to supertype |
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LayerOnInAllViews |
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x |
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deleted, since IFC does not define paper space |
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LayerFrozenInAllViews |
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x |
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deleted, since IFC does not define paper space |
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LayerColour |
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x |
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changed into a more general LayerStyle |
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LayerCurveWidth |
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x |
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deleted, covered by LayerStyle |
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LayerCurveFont |
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x |
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deleted, covered by LayerStyle |
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IfcPresentationResource |
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IfcFontStyle |
x |
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new defined type |
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IfcFontVariant |
x |
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new defined type |
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IfcFontWeight |
x |
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new defined type |
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IfcPreDefinedTextFont |
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x |
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subtype IfcTextStyeFontModel added |
x |
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IfcTextFontName |
x |
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new defined type |
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IfcTextFontSelect |
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x |
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SELECT type renamed from IfcFontSelect |
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IfcTextStyleFontModel |
x |
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new entity to allow for text font definitions following CSS
model |
x |
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IfcProfilePropertyResource |
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IfcStructuralProfileProperties |
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CentreOfGravityInX |
x |
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new attribute, moved from various profile definitions |
x |
x |
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CentreOfGravityInY |
x |
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|
new attribute, moved from various profile definitions |
x |
x |
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IfcProfileResource |
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IfcParameterizedProfileDef |
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x |
all profiles now used as being centric to the bounding box |
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IfcArbitraryOpenProfileDef |
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new subtype IfcCenterLineProfileDef added |
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WR11 |
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x |
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WR to allow area profile type for subtype |
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IfcAsymmetricIShapeProfileDef |
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CentreOfGravityInY |
|
x |
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attribute made optional, profile inserted now at centre of
bounding box |
x |
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IfcCenterLineProfileDef |
x |
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new profile for thin metal plates |
x |
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Thickness |
x |
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new attribute |
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IfcCraneRailAShapeProfileDef |
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CentreOfGravityInY |
|
x |
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attribute made optional, profile inserted now at centre of
bounding box |
x |
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IfcCraneRailFShapeProfileDef |
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CentreOfGravityInY |
|
x |
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attribute made optional, profile inserted now at centre of
bounding box |
x |
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IfcCShapeProfileDef |
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CentreOfGravityInX |
|
x |
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attribute made optional, profile inserted now at centre of
bounding box |
x |
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IfcLShapeProfileDef |
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CentreOfGravityInX |
|
x |
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|
attribute made optional, profile inserted now at centre of
bounding box |
x |
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WR3 |
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x |
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WR deleted |
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IfcTShapeProfileDef |
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CentreOfGravityInY |
|
x |
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|
attribute made optional, profile inserted now at centre of
bounding box |
x |
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| |
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IfcUShapeProfileDef |
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CentreOfGravityInX |
|
x |
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|
attribute made optional, profile inserted now at centre of
bounding box |
x |
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IfcPropertyResource |
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IfcPropertySingleValue |
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