IfcPlanarBox

BACnet MVD

#### IfcPlanarBox

Natural language names

| Umgrenzungsfläche
| Planar Box
| Boite planaire

Change log

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 | B
--- | --- | --- | --- | --- | ---

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 | 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
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

`

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