8.13.3.6 IfcTextLiteralWithExtent

8.13.3.6.1 Semantic definition

The text literal with extent is a text literal with the additional explicit information of the planar extent. An alignment attribute defines how the text box is aligned to the placement and how it may expand if additional lines of text need to be added.

Figure A shows the use of planar extent and box alignment to position the text string

IfcTextLiteralWithExtent_Fig1.png 8,1 KB — Figure A — Text literal with extent and alignment

The planar extent defines the box model within which the text is placed. Padding maybe defined in the text style that offsets the text from the box to its inside.

{ .change-ifc2x3}

8.13.3.6.2 Entity inheritance

8.13.3.6.3 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.
IfcTextLiteral (3)
1	Literal	IfcPresentableText	The text literal to be presented.
2	Placement	IfcAxis2Placement	An IfcAxis2Placement that determines the placement and orientation of the presented string.
3	Path	IfcTextPath	The writing direction of the text literal.
Click to show 5 hidden inherited attributes Click to hide 5 inherited attributes
IfcTextLiteralWithExtent (2)
4	Extent	IfcPlanarExtent	The extent in the x and y direction of the text literal.
5	BoxAlignment	IfcBoxAlignment	The alignment of the text literal relative to its position.

Table B

8.13.3.6.4 Formal propositions

Name	Description
WR31	The subtype of IfcPlanarExtent, IfcPlanarBox, should not be used to represent an Extent for the text literal.
`NOT('IFC4X4_DEV_20260525.IFCPLANARBOX' IN TYPEOF(Extent))`

Table C

8.13.3.6.5 Formal representation

ENTITY IfcTextLiteralWithExtent
SUBTYPE OF (IfcTextLiteral);
Extent : IfcPlanarExtent;
BoxAlignment : IfcBoxAlignment;
WHERE
WR31 : NOT('IFC4X4_DEV_20260525.IFCPLANARBOX' IN TYPEOF(Extent));
END_ENTITY;

8.13.3.6.6 References

IfcTextLiteral