8.14.3.10 IfcPresentationLayerWithStyle

8.14.3.10.1 Semantic definition

An IfcPresentationLayerWithStyle extends the presentation layer assignment with capabilities to define visibility control, access control and common style information.

The visibility control allows to define a layer to be either 'on' or 'off', and/or 'frozen' or 'not frozen'. The access control allows to block graphical entities from manipulations by setting a layer to be either 'blocked' or 'not blocked'. Common style information can be given to the layer.

8.14.3.10.2 Entity inheritance

8.14.3.10.3 Attributes

#	Attribute	Type	Description
IfcPresentationLayerAssignment (4)
1	Name	IfcLabel	Name of the layer.
2	Description	OPTIONAL IfcText	Additional description of the layer.
3	AssignedItems	SET [1:?] OF IfcLayeredItem	The set of layered items, which are assigned to this layer.
4	Identifier	OPTIONAL IfcIdentifier	An (internal) identifier assigned to the layer.
Click to show 4 hidden inherited attributes
IfcPresentationLayerWithStyle (4)
5	LayerOn	IfcLogical	A logical setting, TRUE indicates that the layer is set to 'On', FALSE that the layer is set to 'Off', UNKNOWN that such information is not available.
6	LayerFrozen	IfcLogical	A logical setting, TRUE indicates that the layer is set to 'Frozen', FALSE that the layer is set to 'Not frozen', UNKNOWN that such information is not available.
7	LayerBlocked	IfcLogical	A logical setting, TRUE indicates that the layer is set to 'Blocked', FALSE that the layer is set to 'Not blocked', UNKNOWN that such information is not available.
8	LayerStyles	SET [0:?] OF IfcPresentationStyle	Assignment of presentation styles to the layer to provide a default style for representation items. NOTE In most cases the assignment of styles to a layer is restricted to an IfcCurveStyle representing the layer curve colour, layer curve thickness, and layer curve type. IFC4-CHANGE The data type has been changed from IfcPresentationStyleSelect (now deprecated) to IfcPresentationStyle.

Table 8.14.3.10.A

8.14.3.10.4 Formal propositions

Name	Description
ApplicableOnlyToItems	The IfcPresentationLayerWithStyle shall only be used to assign subtypes of IfcGeometricRepresentationItem's and to IfcMappedItem. There shall be no instance of subtypes of IfcRepresentation in the set of AssignedItem's. IFC4-CHANGE New where rule.
`SIZEOF(QUERY(temp <* AssignedItems \| (SIZEOF(TYPEOF(temp) * ['IFC4X3_DEV_738df036.IfcGeometricRepresentationItem','IFC4X3_DEV_738df036.IfcMappedItem']) >= 1))) = SIZEOF(AssignedItems)`

Table 8.14.3.10.B

8.14.3.10.5 Formal representation

 ENTITY IfcPresentationLayerWithStyle
 SUBTYPE OF (IfcPresentationLayerAssignment);
	LayerOn : IfcLogical;
	LayerFrozen : IfcLogical;
	LayerBlocked : IfcLogical;
	LayerStyles : SET [0:?] OF IfcPresentationStyle;
 WHERE
	ApplicableOnlyToItems : SIZEOF(QUERY(temp <* AssignedItems | (SIZEOF(TYPEOF(temp) * ['IFC4X3_DEV_738df036.IfcGeometricRepresentationItem','IFC4X3_DEV_738df036.IfcMappedItem']) >= 1))) = SIZEOF(AssignedItems);
END_ENTITY;

8.14.3.10.6 References

IfcPresentationLayerAssignment