IfcRelConnectsWithRealizingElements

Semantic definitions at the entity

Entity 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 IfcRelConnectsElement 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.

EXAMPLE It may be used to describe the attachment of one element to another where the attachment is realized by a 'fixing' element such as a bracket. It may also be used to describe the mounting of one element onto another such as the requirement for the mounting major plant items onto builders work bases and/or anti-vibration isolators.

HISTORY New entity in IFC2x2.

NOTE Regarding bridge prestressing, the tendon conduits and the tendon anchors are aggregated into the concrete elements, but not always the tendon itself (as the tendon may pass through several elements). Therefore, it is good practise to use RelConnects relationships between the tendon and the tendon conduits and the tendon anchors.

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.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
8	RealizingElements	IfcElement	S[1:?]	Defines the elements that realize a connection relationship.	X
9	ConnectionType	IfcLabel	?	The type of the connection given for informal purposes, it may include labels, like 'joint', 'rigid joint', 'flexible joint', etc.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRoot
1	GlobalId	IfcGloballyUniqueId		Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	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 in stored - either as addition, deletion or modification. IFC4 CHANGE The attribute has been changed to be OPTIONAL.	X
3	Name	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.	X
4	Description	IfcText	?	Optional description, provided for exchanging informative comments.	X
IfcRelationship
IfcRelConnects
IfcRelConnectsElements
5	ConnectionGeometry	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).	X
6	RelatingElement	IfcElement		Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatingElement.	X
7	RelatedElement	IfcElement		Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatedElement.	X
IfcRelConnectsWithRealizingElements
8	RealizingElements	IfcElement	S[1:?]	Defines the elements that realize a connection relationship.	X
9	ConnectionType	IfcLabel	?	The type of the connection given for informal purposes, it may include labels, like 'joint', 'rigid joint', 'flexible joint', etc.	X

#	Concept	Template	Model View
IfcRoot
	Identity	Software Identity	General Usage
	Revision Control	Revision Control	General Usage

Formal representations

XML Specification

 <xs:element name="IfcRelConnectsWithRealizingElements" type="ifc:IfcRelConnectsWithRealizingElements" substitutionGroup="ifc:IfcRelConnectsElements" nillable="true"/>

 <xs:complexType name="IfcRelConnectsWithRealizingElements">

  <xs:complexContent>

   <xs:extension base="ifc:IfcRelConnectsElements">

    <xs:sequence>

     <xs:element name="RealizingElements">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcElement" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcElement"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="ConnectionType" type="ifc:IfcLabel" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelConnectsWithRealizingElements

 SUBTYPE OF (IfcRelConnectsElements);

  RealizingElements : SET [1:?] OF IfcElement;

  ConnectionType : OPTIONAL IfcLabel;

END_ENTITY;

 EXPRESS-G diagram

Item	Change	Description
IFC2x3 to IFC4 4.0.0.0
IfcRelConnectsWithRealizingElements
OwnerHistory	MODIFIED	Instantiation changed to OPTIONAL.

	Verbindet Elemente mit Befestigungen - Relation
	Rel Connects With Realizing Elements

IfcRelConnectsWithRealizingElements

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to General Usage

Formal representations