Ifc General Mapping

Table of Contents

• Geometry
• Attributes
• Assembly and Structure

This information is available for IFC.

Geometry

DATAKIT Class	Ifc Entity	Remarks
Dtk_mesh	IfcFacetedBRep (IFC2x3) or IfcTriangulatedFaceSet (IFC4) as a geometric representation (IfcShapeAspect) of an IfcBuildingElement	Default IfcBuildingElement subtype is IfcBuildingElementProxy
Dtk_Body	IfcAdvancedBRep as a geometric representation (IfcShapeAspect) of an IfcBuildingElement

Attributes

DATAKIT Class	Ifc Entity	Remarks
Dtk_Component Name	Field "Name" of IfcBuildingElement
Dtk_RGB colors	IfcColourRGB linked to the product by an IfcStyledItem, or IfcIndexedColourMap if writing a mesh with several colors (IFC4)
Dtk_RGB alpha	IfcSurfaceStyleRendering linked to the product by an IfcStyledItemd
Dtk_MetadataGroup	IfcPropertySet of IfcPropertySingleValue	Each metadata group with the same category creates a different IfcPropertySet with "name" field corresponding to the category (if no category, default name is "UserDefined")
Dtk_Metadata	IfcPropertySingleValue

Assembly and Structure

DATAKIT Class	Ifc Entity	Remarks
Dtk_Component as PrototypeComponentType	IfcBuildingElementType	The IfcBuildingElementType has the Prototype geometry and properties
Dtk_Component as InstanceComponentType	IfcBuildingElement , with geometry linked to IfcBuildingElementType	If the instance has its own geometry, it ovewrites type geometry. Properties are merged with priority to instance properties