#### 5.4.3.19 IfcRelConnectsPorts

| Connection de ports
| Verbindet Anschlüsse - Relation

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.

XSD 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;

Attribute Definitions:

RelatingPort | : | Reference to the first port that is connected by the objectified relationship.
RelatedPort | : | Reference to the second port that is connected by the objectified relationship.
RealizingElement | : | Defines the element that realizes a port connection relationship.

Formal Propositions:

NoSelfReference | : | The instance of the RelatingPort shall not be the same instance as the RelatedPort.

Inheritance Graph:

ENTITY IfcRelConnectsPorts

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcRelationship

| ENTITY IfcRelConnects

| ENTITY IfcRelConnectsPorts

RelatingPort | : | IfcPort;
RelatedPort | : | IfcPort;
RealizingElement | : | OPTIONAL IfcElement;

END_ENTITY;

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