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5.4.3.48 IfcRelConnectsElements

5.4.3.48.1 Semantic definition

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.

  • In this case the geometrical constraints of the connection are provided by the optional relationship to the IfcConnectionGeometry. The connection geometry is provided as a point, curve or surface within the local placement coordinate systems of the connecting elements.
  • If the connection geometry is omitted then the connection is provided as a logical connection. Under this circumstance, the connection point, curve or surface has to be recalculated by the receiving application.

5.4.3.48.2 Entity inheritance

5.4.3.48.3 Attributes

# Attribute Type Description
IfcRoot (4)
Click to show 4 hidden inherited attributes
IfcRelConnectsElements (3)
5 ConnectionGeometry OPTIONAL IfcConnectionGeometry

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).

6 RelatingElement IfcElement

Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatingElement.

7 RelatedElement IfcElement

Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatedElement.

Table 5.4.3.48.B

5.4.3.48.4 Formal propositions

Name Description
NoSelfReference

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

RelatingElement :<>: RelatedElement
Table 5.4.3.48.C

5.4.3.48.5 Concept usage

Concept Usage Description
IfcRoot (2)
Click to show 2 hidden inherited concepts
Table 5.4.3.48.D

5.4.3.48.6 Examples

5.4.3.48.7 Formal representation

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

5.4.3.48.8 References

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5.4.3.48.9 Changelog

5.4.3.48.9.1 IFC4

  • where rule, NoSelfReference
  • where rule, WR31