IfcPlanarExtent

Natural language names
Flächiges Ausmaß
Planar Extent
Extension planaire
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcPlanarExtentMOVEDSchema 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
#AttributeTypeCardinalityDescription G
1SizeInXIfcLengthMeasure The extent in the direction of the x-axis. X
2SizeInYIfcLengthMeasure The extent in the direction of the y-axis. X
Inherited definitions from supertypes
Entity inheritance IfcPlanarBox IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@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
StyledByItemIfcStyledItem
@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
1SizeInXIfcLengthMeasure The extent in the direction of the x-axis. X
2SizeInYIfcLengthMeasure 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;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcTextLiteralWithExtent

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