IfcRelConnectsWithRealizingElements

BACnet MVD

#### IfcRelConnectsWithRealizingElements

Natural language names

| Verbindet Elemente mit Befestigungen - Relation
| Rel Connects With Realizing Elements

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRelConnectsWithRealizingElements |  |  |  |
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### 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.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
8 | RealizingElements | IfcElement | S[1:?] | Defines the elements that realize a connection relationship. | X | 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 | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | 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

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 | 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 | X
6 | RelatingElement | IfcElement |  | Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatingElement. | X | X
7 | RelatedElement | IfcElement |  | Reference to a subtype of IfcElement that is connected by the connection relationship in the role of RelatedElement. | X | X
IfcRelConnectsWithRealizingElements
8 | RealizingElements | IfcElement | S[1:?] | Defines the elements that realize a connection relationship. | X | 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

##### Definitions applying to Design Transfer View

Instance diagram

#####

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### 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

`

References: IfcElement

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