8.12.3.28 IfcStyledItem

RV ⓘ

AbV ⓘ

8.12.3.28.1 Semantic definition

The IfcStyledItem holds presentation style information for products, either explicitly for an IfcGeometricRepresentationItem being part of an IfcShapeRepresentation assigned to a product, or by assigning presentation information to IfcMaterial being assigned as other representation for a product.

If the IfcStyledItem is used within a reference from an IfcProductDefinitionShape then one Item shall be provided.
If the IfcStyledItem is used within a reference from an IfcMaterialDefinitionRepresentation then no Item shall be provided.

Use Definition

Figure 8.12.3.28.A illustrates use of IfcStyledItem for the two usage examples:

As a presentation for a geometric representation item
As a presentation for a material definition

2x4 example — Figure 8.12.3.28.A — Styled item

8.12.3.28.2 Entity inheritance

- IfcRepresentationItem

8.12.3.28.3 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
IfcStyledItem (3)
1	Item	OPTIONAL IfcRepresentationItem	A geometric representation item to which the style is assigned. IFC2x2-Add2 CHANGE The attribute Item has been made optional. Upward compatibility for file based exchange is guaranteed.
2	Styles	SET [1:?] OF IfcPresentationStyle	Representation styles which are assigned, either to an geometric representation item, or to a material definition. IFC4-CHANGE The data type has been changed to IfcStyleAssignmentSelect with upward compatibility for file based exchange. NOTE Only the select item IfcPresentationStyle shall be used from IFC4 onwards, the IfcPresentationStyleAssignment has been deprecated.
3	Name	OPTIONAL IfcLabel	The word, or group of words, by which the styled item is referred to.

Table 8.12.3.28.F

8.12.3.28.4 Formal propositions

Name	Description
ApplicableItem	A styled item cannot be styled by another styled item.
`NOT('IFC4X3_DEV_738df036.IFCSTYLEDITEM' IN TYPEOF(Item))`

Table 8.12.3.28.G

8.12.3.28.5 Examples

Figure 8.12.3.28.B

Linear Placement Of Signal
Figure 8.12.3.28.C

Tessellation With Blob Texture
Figure 8.12.3.28.D

Tessellation With Image Texture
Figure 8.12.3.28.E

Tessellation With Pixel Texture

8.12.3.28.6 Formal representation

 ENTITY IfcStyledItem
 SUBTYPE OF (IfcRepresentationItem);
	Item : OPTIONAL IfcRepresentationItem;
	Styles : SET [1:?] OF IfcPresentationStyle;
	Name : OPTIONAL IfcLabel;
 WHERE
	ApplicableItem : NOT('IFC4X3_DEV_738df036.IFCSTYLEDITEM' IN TYPEOF(Item));
END_ENTITY;

8.12.3.28 IfcStyledItem

8.12.3.28.1 Semantic definition

8.12.3.28.2 Entity inheritance

8.12.3.28.3 Attributes

8.12.3.28.4 Formal propositions

8.12.3.28.5 Examples

8.12.3.28.6 Formal representation

8.12.3.28.7 References

8.12.3.28.8 Changelog

8.12.3.28.8.1 IFC4

8.12.3.28.8.2 IFC4.3_DEV_738df036

	ENTITY IfcStyledItem
	SUBTYPE OF (IfcRepresentationItem);
	Item : OPTIONAL IfcRepresentationItem;
	Styles : SET [1:?] OF IfcPresentationStyle;
	Name : OPTIONAL IfcLabel;
	WHERE
	ApplicableItem : NOT('IFC4X3_DEV_738df036.IFCSTYLEDITEM' IN TYPEOF(Item));
	END_ENTITY;