IfcWellKnownText

Semantic definitions at the entity

Entity definition

A Well Known Text (WKT) literal is a structured textual representation of the definition of a coordinate reference systems according to ISO 19125-1:2004 or ISO 19162:2019.

NOTE This entity encapsulates the IfcWellKnownTextLiteral in order to associate a WKT definition to an IfcCoordinateReferenceSystem by means of an inverse attribute.

HISTORY New entity in IFC4X3_ADD1.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	WellKnownText	IfcWellKnownTextLiteral		The WKT literal this entity encapsulates.	X
2	CoordinateReferenceSystem	IfcCoordinateReferenceSystem		The IfcCoordinateReferenceSystem for which this the WKT definition is provided.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Description	G
IfcWellKnownText
1	WellKnownText	IfcWellKnownTextLiteral	The WKT literal this entity encapsulates.	X
2	CoordinateReferenceSystem	IfcCoordinateReferenceSystem	The IfcCoordinateReferenceSystem for which this the WKT definition is provided.	X

Formal representations

XML Specification

 <xs:element name="IfcWellKnownText" type="ifc:IfcWellKnownText" substitutionGroup="ifc:Entity" nillable="true"/>

 <xs:complexType name="IfcWellKnownText">

  <xs:complexContent>

   <xs:extension base="ifc:Entity">

    <xs:sequence>

     <xs:element name="CoordinateReferenceSystem" type="ifc:IfcCoordinateReferenceSystem" nillable="true"/>

    </xs:sequence>

    <xs:attribute name="WellKnownText" type="ifc:IfcWellKnownTextLiteral" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcWellKnownText;

  WellKnownText : IfcWellKnownTextLiteral;

  CoordinateReferenceSystem : IfcCoordinateReferenceSystem;

END_ENTITY;

 EXPRESS-G diagram