5.4.3.51 IfcRelConnectsWithRealizingElements

5.4.3.51.1 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.

5.4.3.51.2 Entity inheritance

5.4.3.51.3 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. NOTE Only the last modification is stored - either as addition, deletion or modification. IFC4-CHANGE The attribute has been changed to be OPTIONAL.
3	Name	OPTIONAL IfcLabel	An 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	An optional description, provided to exchange 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). NOTE ConnectionGeometry does not consider shape and position of the realizing element.
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 A

5.4.3.51.4 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 also provide a name and description for the concept.
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Table B

5.4.3.51.5 Formal representation

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