IfcTextLiteral

BACnet MVD

#### IfcTextLiteral

Natural language names

| Text - Buchstabensymbole
| Text Literal

##### Semantic definitions at the entity

Entity definition

The text literal is a geometric representation item which describes a text string using a string literal and additional position and path information. The text size and appearance is determined by the IfcTextStyle that is associated to the IfcTextLiteral through an IfcStyledItem.

The text string is placed within the planar extent (the box) defined within the subtype IfcTextLiteralWithExtent.

> NOTE Entity adapted from text_literal defined in ISO10303-46

> HISTORY New entity in IFC2x2.

> IFC2x3 CHANGE The IfcTextLiteral has been changed by removing Font and Alignment.

> DEPRECATION The use of IfcTextLiteral is deprecated and it will be made abstract.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
1 | Literal | IfcPresentableText |  | The text literal to be presented. |  | X
2 | Placement | IfcAxis2Placement |  | An IfcAxis2Placement that determines the placement and orientation of the presented string. |  | X
3 | Path | IfcTextPath |  | The writing direction of the text literal. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRepresentationItem

LayerAssignment

IfcPresentationLayerAssignment
@AssignedItems

S[0:1]

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.

X

StyledByItem

IfcStyledItem
@Item

S[0:1]

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.

X

X

IfcGeometricRepresentationItem
IfcTextLiteral
1 | Literal | IfcPresentableText |  | The text literal to be presented. |  | X
2 | Placement | IfcAxis2Placement |  | An IfcAxis2Placement that determines the placement and orientation of the presented string. |  | X
3 | Path | IfcTextPath |  | The writing direction of the text literal. |  | X

##### Formal representations

XML Specification
`<xs:element name="IfcTextLiteral" type="ifc:IfcTextLiteral" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
<xs:complexType name="IfcTextLiteral">
<xs:complexContent>
<xs:extension base="ifc:IfcGeometricRepresentationItem">
<xs:sequence>
<xs:element name="Placement">
<xs:complexType>
<xs:group ref="ifc:IfcAxis2Placement"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="Literal" type="ifc:IfcPresentableText" use="optional"/>
<xs:attribute name="Path" type="ifc:IfcTextPath" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcTextLiteral
SUPERTYPE OF(IfcTextLiteralWithExtent)
SUBTYPE OF (IfcGeometricRepresentationItem);
Literal : IfcPresentableText;
Placement : IfcAxis2Placement;
Path : IfcTextPath;
END_ENTITY;

EXPRESS-G diagram

`

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