IfcRectangleProfileDef

BACnet MVD

#### IfcRectangleProfileDef

Natural language names

| Rechteckprofil - parametrische Definition
| Rectangle Profile Def
| Définition de profil rectangulaire

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRectangleProfileDef |  |  |  |
Position |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### Semantic definitions at the entity

Entity definition

IfcRectangleProfileDef defines a rectangle as the profile definition used by the swept surface geometry or the swept area solid. It is given by its X extent and its Y extent, and placed within the 2D position coordinate system, established by the Position attribute. It is placed centric within the position coordinate system.

> HISTORY New entity in IFC1.5.

Figure 373 illustrates parameters of the rectangle profile definition.

Position
The parameterized profile defines its own position coordinate system. The underlying coordinate system is defined by the swept surface or swept area solid that uses the profile definition. It is the xy plane of either:

- IfcSweptSurface.Position
- IfcSweptAreaSolid.Position

or in case of sectioned spines the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions.
By using offsets of the position location, the parameterized profile can be positioned centric (using x,y offsets = 0.), or at any position relative to the profile. Explicit coordinate offsets are used to define cardinal points (for example, upper-left bound).

Parameter
The IfcRectangleProfileDef is defined within the position coordinate system, where the XDim defines the length measure for the length of the rectangle (half along the positive x-axis) and the YDim defines the length measure for the width of the rectangle (half along the positive y-axis).

Figure 373 — Rectangle profile

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
4 | XDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the x-axis. | X | X
5 | YDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the y-axis. | X | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcProfileDef
1 | ProfileType | IfcProfileTypeEnum |  | Defines the type of geometry into which this profile definition shall be resolved, either a curve or a surface area. In case of curve the profile should be referenced by a swept surface, in case of area the profile should be referenced by a swept area solid. | X | X
2 | ProfileName | IfcLabel | ? | Human-readable name of the profile, for example according to a standard profile table. As noted above, machine-readable standardized profile designations should be provided in IfcExternalReference.ItemReference. | X | X

HasExternalReference

IfcExternalReferenceRelationship
@RelatedResourceObjects

S[0:?]

Reference to external information, e.g. library, classification, or document information, which is associated with the profile.

> IFC4 CHANGE New inverse attribute

X

HasProperties

IfcProfileProperties
@ProfileDefinition

S[0:?]

Additional properties of the profile, for example mechanical properties.

> IFC4 CHANGE New inverse attribute

X

IfcParameterizedProfileDef
3 | Position | IfcAxis2Placement2D | ? | Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied. | X | X
IfcRectangleProfileDef
4 | XDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the x-axis. | X | X
5 | YDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the y-axis. | X | X

##### Examples

- Wall standard case
- Slab openings

##### Formal representations

XML Specification
`<xs:element name="IfcRectangleProfileDef" type="ifc:IfcRectangleProfileDef" substitutionGroup="ifc:IfcParameterizedProfileDef" nillable="true"/>
<xs:complexType name="IfcRectangleProfileDef">
<xs:complexContent>
<xs:extension base="ifc:IfcParameterizedProfileDef">
<xs:attribute name="XDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="YDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcRectangleProfileDef
SUPERTYPE OF(ONEOF(IfcRectangleHollowProfileDef, IfcRoundedRectangleProfileDef))
SUBTYPE OF (IfcParameterizedProfileDef);
XDim : IfcPositiveLengthMeasure;
YDim : IfcPositiveLengthMeasure;
END_ENTITY;

EXPRESS-G diagram

`

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