IfcRelConnects

BACnet MVD

#### IfcRelConnects

Natural language names

| Verbindet - Relation (allgemein)
| Rel Connects
| Connection

##### Semantic definitions at the entity

Entity definition

IfcRelConnects is a connectivity relationship that connects objects under some criteria. As a general connectivity it does not imply constraints, however subtypes of the relationship define the applicable object types for the connectivity relationship and the semantics of the particular connectivity.

> HISTORY New entity in IFC2x.

##### 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

##### Definitions applying to Design Transfer View

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="IfcRelConnects" type="ifc:IfcRelConnects" abstract="true" substitutionGroup="ifc:IfcRelationship" nillable="true"/>
<xs:complexType name="IfcRelConnects" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcRelationship"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcRelConnects
ABSTRACT SUPERTYPE OF(ONEOF(IfcRelConnectsElements, IfcRelConnectsPortToElement, IfcRelConnectsPorts, IfcRelConnectsStructuralActivity, IfcRelConnectsStructuralMember, IfcRelContainedInSpatialStructure, IfcRelCoversBldgElements, IfcRelCoversSpaces, IfcRelFillsElement, IfcRelFlowControlElements, IfcRelInterferesElements, IfcRelReferencedInSpatialStructure, IfcRelSequence, IfcRelServicesBuildings, IfcRelSpaceBoundary))
SUBTYPE OF (IfcRelationship);
END_ENTITY;

EXPRESS-G diagram

`

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