IfcRelConnectsPorts

Natural language names
Verbindet Anschlüsse - Relation
Rel Connects Ports
Connection de ports
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcRelConnectsPorts
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
Semantic definitions at the entity
Entity definition

An IfcRelConnectsPorts relationship defines the relationship that is made between two ports at their point of connection. It may include the connection geometry between two ports.

The objectified relationship IfcRelConnectsPorts is required for defining how two instances of IfcPort connect together. Each of the ports is logically contained within the IfcDistributionElement by using the ordered collection IfcRelNests.

HISTORY  New entity in IFC2.0, modified in IFC2x.

IFC4 CHANGE  Previously the containment of the IfcPort within the IfcDistributionElement had been realized using the IfcRelConnectsPortToElement relationship.

Attribute definitions
#AttributeTypeCardinalityDescription G
5RelatingPortIfcPort Reference to the first port that is connected by the objectified relationship. X
6RelatedPortIfcPort Reference to the second port that is connected by the objectified relationship. X
7RealizingElementIfcElement? Defines the element that realizes a port connection relationship. X
Formal Propositions
RuleDescription
NoSelfReferenceThe instance of the RelatingPort shall not be the same instance as the RelatedPort.
Inherited definitions from supertypes
Entity inheritance IfcRelConnects IfcRelationship IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRoot
1GlobalIdIfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory? 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
3NameIfcLabel? 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
4DescriptionIfcText? Optional description, provided for exchanging informative comments. X
IfcRelationship
IfcRelConnects
IfcRelConnectsPorts
5RelatingPortIfcPort Reference to the first port that is connected by the objectified relationship. X
6RelatedPortIfcPort Reference to the second port that is connected by the objectified relationship. X
7RealizingElementIfcElement? Defines the element that realizes a port connection relationship. X
Definitions applying to General Usage

Concept inheritance

#ConceptTemplateModel View
IfcRoot
IdentitySoftware IdentityGeneral Usage
Revision ControlRevision ControlGeneral Usage
Formal representations
XML Specification
 <xs:element name="IfcRelConnectsPorts" type="ifc:IfcRelConnectsPorts" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>
 <xs:complexType name="IfcRelConnectsPorts">
  <xs:complexContent>
   <xs:extension base="ifc:IfcRelConnects">
    <xs:sequence>
     <xs:element name="RelatingPort" type="ifc:IfcPort" nillable="true"/>
     <xs:element name="RelatedPort" type="ifc:IfcPort" nillable="true"/>
     <xs:element name="RealizingElement" type="ifc:IfcElement" nillable="true" minOccurs="0"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcRelConnectsPorts
 SUBTYPE OF (IfcRelConnects);
  RelatingPort : IfcPort;
  RelatedPort : IfcPort;
  RealizingElement : OPTIONAL IfcElement;
 WHERE
  NoSelfReference : RelatingPort :<>: RelatedPort;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcPort

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