﻿ IfcRectangleProfileDef

#### IfcRectangleProfileDef

Natural language names
 Rechteckprofil - parametrische Definition Rectangle Profile Def Définition de profil rectangulaire
Change log
ItemSPFXMLChangeDescription
4.0.0.0
IfcRectangleProfileDef
PositionMODIFIEDInstantiation 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 446 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 446 — Rectangle profile

Attribute definitions
#AttributeTypeCardinalityDescription G
4XDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the x-axis.X
5YDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the y-axis.X
##### Inherited definitions from supertypes
Entity inheritance
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcProfileDef
1ProfileTypeIfcProfileTypeEnum 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
2ProfileNameIfcLabel? 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
HasExternalReferenceIfcExternalReferenceRelationship
@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
HasPropertiesIfcProfileProperties
@ProfileDefinition
S[0:?]Additional properties of the profile, for example mechanical properties.
IFC4 CHANGE New inverse attribute
X
IfcParameterizedProfileDef
3PositionIfcAxis2Placement2D? Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied. X
IfcRectangleProfileDef
4XDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the x-axis.X
5YDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the y-axis.X
##### Definitions applying to General Usage

Concept inheritance

#ConceptTemplateModel View
IfcProfileDef
Property Sets for ObjectsProperty Sets for ObjectsGeneral Usage

##### 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 ```