IfcPlanarExtent

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcPlanarExtent			MOVED	Schema changed from IFCPRESENTATIONRESOURCE to IFCPRESENTATIONDEFINITIONRESOURCE.

Semantic definitions at the entity

Entity definition

The planar extent defines the extent along the two axes of the two-dimensional coordinate system, independently of its position. If the planar extent is used within a three-dimensional coordinate system, it defines the extent along the x and y axes.

NOTE Entity adapted from planar_extent defined in ISO10303-46

HISTORY New entity in IFC2x2.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	SizeInX	IfcLengthMeasure		The extent in the direction of the x-axis.	X
2	SizeInY	IfcLengthMeasure		The extent in the direction of the y-axis.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
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
IfcGeometricRepresentationItem
IfcPlanarExtent
1	SizeInX	IfcLengthMeasure		The extent in the direction of the x-axis.	X
2	SizeInY	IfcLengthMeasure		The extent in the direction of the y-axis.	X

Formal representations

XML Specification

 <xs:element name="IfcPlanarExtent" type="ifc:IfcPlanarExtent" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>

 <xs:complexType name="IfcPlanarExtent">

  <xs:complexContent>

   <xs:extension base="ifc:IfcGeometricRepresentationItem">

    <xs:attribute name="SizeInX" type="ifc:IfcLengthMeasure" use="optional"/>

    <xs:attribute name="SizeInY" type="ifc:IfcLengthMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcPlanarExtent

 SUPERTYPE OF(IfcPlanarBox)

 SUBTYPE OF (IfcGeometricRepresentationItem);

  SizeInX : IfcLengthMeasure;

  SizeInY : IfcLengthMeasure;

END_ENTITY;

 EXPRESS-G diagram

	Flächiges Ausmaß
	Planar Extent
	Extension planaire