5.4.3.30 IfcRelConnectsElements

Connection d'éléments
Verbindet Elemente - Relation

The IfcRelConnectsElements objectified relationship provides the generalization of the connectivity between elements. It is a 1 to 1 relationship. The concept of two elements being physically or logically connected is described independently from the connecting elements. The connectivity may be related to the shape representation of the connected entities by providing a connection geometry.

HISTORY  New entity in IFC1.0.

XSD Specification:

 <xs:element name="IfcRelConnectsElements" type="ifc:IfcRelConnectsElements" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>
 <xs:complexType name="IfcRelConnectsElements">
  <xs:complexContent>
   <xs:extension base="ifc:IfcRelConnects">
    <xs:sequence>
     <xs:element name="ConnectionGeometry" type="ifc:IfcConnectionGeometry" nillable="true" minOccurs="0"/>
     <xs:element name="RelatingElement" type="ifc:IfcElement" nillable="true"/>
     <xs:element name="RelatedElement" type="ifc:IfcElement" nillable="true"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcRelConnectsElements
SUPERTYPE OF(ONEOF(IfcRelConnectsPathElements, IfcRelConnectsWithRealizingElements))
SUBTYPE OF IfcRelConnects;
ConnectionGeometry : OPTIONAL IfcConnectionGeometry;
RelatingElement : IfcElement;
RelatedElement : IfcElement;
WHERE
NoSelfReference : RelatingElement :<>: RelatedElement;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

ConnectionGeometry : The geometric shape representation of the connection geometry that is provided in the object coordinate system of the RelatingElement (mandatory) and in the object coordinate system of the RelatedElement (optionally).
RelatingElement : Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatingElement.
RelatedElement : Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatedElement.

Formal Propositions:

NoSelfReference : The instance of the RelatingElement shall not be the same instance as the RelatedElement.

Inheritance Graph:

ENTITY IfcRelConnectsElements
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcRelationship
ENTITY IfcRelConnects
ENTITY IfcRelConnectsElements
ConnectionGeometry : OPTIONAL IfcConnectionGeometry;
RelatingElement : IfcElement;
RelatedElement : IfcElement;
END_ENTITY;

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