8.9.3.38 IfcMappedItem

RV ⓘ

AbV ⓘ

8.9.3.38.1 Semantic definition

The IfcMappedItem is the inserted instance of a source definition (to be compared with a block / shared cell / macro definition). The instance is inserted by applying a Cartesian transformation operator as the MappingTarget.

Informal Propositions

A mapped item shall not be self-defining by participating in the definition of the representation being mapped.
The dimensionality of the mapping source and the mapping target has to be the same, if the mapping source is a geometric representation item.

8.9.3.38.2 Entity inheritance

- IfcRepresentationItem

8.9.3.38.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items. IFC2x3-CHANGE The inverse attribute LayerAssignments has been added. IFC4-CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
	StyledByItem	SET [0:1] OF IfcStyledItem FOR Item	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. IFC2x3-CHANGE The inverse attribute StyledByItem has been added.
Click to show 2 hidden inherited attributes
IfcMappedItem (2)
1	MappingSource	IfcRepresentationMap	A representation map that is the source of the mapped item. It can be seen as a block (or cell or marco) definition.
2	MappingTarget	IfcCartesianTransformationOperator	A representation item that is the target onto which the mapping source is mapped. It is constraint to be a Cartesian transformation operator.

Table 8.9.3.38.K

8.9.3.38.4 Examples

Figure 8.9.3.38.A

Basin Tessellation
Figure 8.9.3.38.B

Reinforcing Assembly
Figure 8.9.3.38.C

Mapped Shape With Multiple Items
Figure 8.9.3.38.D

Linear Placement Of Signal
Figure 8.9.3.38.E

Bath Csg Solid
Figure 8.9.3.38.F

Basin Faceted Brep
Figure 8.9.3.38.G

Mapped Shape Without Transformation
Figure 8.9.3.38.H

Mapped Shape With Transformation
Figure 8.9.3.38.I

Reinforcing Stirrup
Figure 8.9.3.38.J

Basin Advanced Brep

8.9.3.38.5 Formal representation

 ENTITY IfcMappedItem
 SUBTYPE OF (IfcRepresentationItem);
	MappingSource : IfcRepresentationMap;
	MappingTarget : IfcCartesianTransformationOperator;
END_ENTITY;