Segment de câble

A cable segment is a flow segment used to carry electrical power, data, or telecommunications signals.

A cable segment is used to typically join two sections of an electrical network or a network of components carrying the electrical service.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 336.

Table 336 — IfcCableSegment Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 337.

Table 337 — IfcCableSegment Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 338.

Table 338 — IfcCableSegment Quantity Sets

Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity as shown in Table 339.
ConductorMaterial from which the conductors are constructed, such as Aluminium or Copper.
InsulationThe material from which the insulation is constructed such as PVC, PEX, or EPR.
ScreenThe material from which the screen that covers the sheath is constructed (mantel) such as Aluminium, Copper, Steel, or Lead.
SheathThe outer sheathing of the cable which may be color-coded.

Table 339 — IfcCableSegment Material Profile Set Usage

Object Aggregation

The Object Aggregation concept applies to this entity as shown in Table 340.
CABLESEGMENTIfcCableSegmentCable segments may be aggregated into cable cores.
CORESEGMENTIfcCableSegmentCable cores may be aggregated into cable conductors.

Table 340 — IfcCableSegment Object Aggregation

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 341.
 InputSINKNOTDEFINEDThe input end of the cable. While many cables may be bidirectional, port direction is indicated for connectivity purposes.
 OutputSOURCENOTDEFINEDThe output end of the cable. While many cables may be bidirectional, port direction is indicated for connectivity purposes.

Table 341 — IfcCableSegment Port Nesting

XSD Specification:

 <xs:element name="IfcCableSegment" type="ifc:IfcCableSegment" substitutionGroup="ifc:IfcFlowSegment" nillable="true"/>
 <xs:complexType name="IfcCableSegment">
   <xs:extension base="ifc:IfcFlowSegment">
    <xs:attribute name="PredefinedType" type="ifc:IfcCableSegmentTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcCableSegment
SUBTYPE OF IfcFlowSegment;
PredefinedType : OPTIONAL IfcCableSegmentTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcCableSegmentTypeEnum.USERDEFINED) OR ((PredefinedType = IfcCableSegmentTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCELECTRICALDOMAIN.IFCCABLESEGMENTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

PredefinedType :

Identifies the predefined types of cable segment from which the type required may be set.

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcCableSegmentType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no cable segment type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcCableSegmentType.

Inheritance Graph:

ENTITY IfcCableSegment
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowSegment
ENTITY IfcCableSegment
PredefinedType : OPTIONAL IfcCableSegmentTypeEnum;

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