IFC 4.3.0.1 (IFC4X3) development

8.14.3.10 IfcPresentationLayerWithStyle

8.14.3.10.1 Semantic definition

An IfcPresentationLayerAssignmentWithStyle 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 Click to hide 4 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.

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.

SIZEOF(QUERY(temp <* AssignedItems | (SIZEOF(TYPEOF(temp) * ['IFC4X3_DEV_64d1fa4d.IfcGeometricRepresentationItem','IFC4X3_DEV_64d1fa4d.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_64d1fa4d.IfcGeometricRepresentationItem','IFC4X3_DEV_64d1fa4d.IfcMappedItem']) >= 1))) = SIZEOF(AssignedItems);
END_ENTITY;

8.14.3.10.6 References

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8.14.3.10.7 Changelog

  • where rule, ApplicableOnlyToItems
  • attribute LayerBlocked type, Changed from "logical" to "IfcLogical"
  • attribute LayerFrozen type, Changed from "logical" to "IfcLogical"
  • attribute LayerOn type, Changed from "logical" to "IfcLogical"
  • attribute LayerStyles type, Changed from "set[0:?] of IfcPresentationStyleSelect" to "set[0:?] of IfcPresentationStyle"
  • where rule, ApplicableOnlyToItems
  • where rule, ApplicableOnlyToItems