IfcPlanarBox

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

Semantic definitions at the entity

Entity definition

A planar box specifies an arbitrary rectangular box and its location in a two dimensional Cartesian coordinate system. If the planar box is used within a three-dimensional coordinate system, it defines the rectangular box within the XY plane.

NOTE Entity adapted from planar_box defined in ISO10303-46

HISTORY New entity in IFC2x2.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
3	Placement	IfcAxis2Placement		The IfcAxis2Placement positions a local coordinate system for the definition of the rectangle. The origin of this local coordinate system serves as the lower left corner of the rectangular box. NOTE In case of a 3D placement by IfcAxisPlacement3D the IfcPlanarBox is defined within the xy plane of the definition coordinate system.	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
IfcPlanarBox
3	Placement	IfcAxis2Placement		The IfcAxis2Placement positions a local coordinate system for the definition of the rectangle. The origin of this local coordinate system serves as the lower left corner of the rectangular box. NOTE In case of a 3D placement by IfcAxisPlacement3D the IfcPlanarBox is defined within the xy plane of the definition coordinate system.	X

Formal representations

XML Specification

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

 <xs:complexType name="IfcPlanarBox">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="Placement">

      <xs:complexType>

       <xs:group ref="ifc:IfcAxis2Placement"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcPlanarBox

 SUBTYPE OF (IfcPlanarExtent);

  Placement : IfcAxis2Placement;

END_ENTITY;

 EXPRESS-G diagram

	Umgrenzungsfläche
	Planar Box
	Boite planaire