IFC 4.3.0.1 (IFC4X3) development

8.9.3.39 IfcMappedItem

8.9.3.39.1 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:

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

8.9.3.39.2 Entity inheritance

8.9.3.39.3 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.

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.

Click to show 2 hidden inherited attributes Click to hide 2 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 8.9.3.39.A

8.9.3.39.4 Formal representation

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

8.9.3.39.5 References

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