IFC (IFC4X3_ADD2) under development IfcRelConnectsWithRealizingElements Semantic definition

IfcRelConnectsWithRealizingElements defines a generic relationship that is made between two elements that require the realization of that relationship by means of further realizing elements.

An IfcRelConnectsWithRealizingElements is a specialization of IfcRelConnectsElements where the connecting operation has the additional attribute of (one or many) realizing elements that may be used to realize or further qualify the relationship. It is defined as a ternary relationship.

The connection types for bridges include:

  • TrussJoint: Joint between truss members.
  • ExpansionJoint: Joint allowing movement, usually due to thermal expansion difference in structures, with DiscreteAccessory of type EXPANSION_JOINT_DEVICE as RealizingElement.
  • EmbeddedPartsJoint: Joint for auxiliary parts to structure, with appropriate RealizingElements, such as DiscreteAccessories of type ANCHORPLATE, BRACKET or SHOE.
  • ConstructionJoint: Joint for phasing of construction, typically in in-situ concrete structures. Entity inheritance Attributes

# Attribute Type Description
IfcRoot (4)
1 GlobalId IfcGloballyUniqueId

Assignment of a globally unique identifier within the entire software world.

2 OwnerHistory OPTIONAL IfcOwnerHistory

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

3 Name OPTIONAL IfcLabel

Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.

4 Description OPTIONAL IfcText

Optional description, provided for exchanging informative comments.

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.

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IfcRelConnectsWithRealizingElements (2)
8 RealizingElements SET [1:?] OF IfcElement

Defines the elements that realize a connection relationship.

9 ConnectionType OPTIONAL IfcLabel

The type of the connection given for informal purposes, it may include labels, like 'joint', 'rigid joint', 'flexible joint', etc.

Table Concept usage

Concept Usage Description
IfcRoot (2)
Revision Control General

Ownership, history, and merge state is captured using IfcOwnerHistory.

Software Identity General

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

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Table Formal representation

ENTITY IfcRelConnectsWithRealizingElements
 SUBTYPE OF (IfcRelConnectsElements);
	RealizingElements : SET [1:?] OF IfcElement;
	ConnectionType : OPTIONAL IfcLabel;
END_ENTITY; References

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