IFC 4.3.0.1 (IFC4X3) development

4.4.4.7 Type Port Nesting

Ports may be specified on types, following the same rules as defined for corresponding occurrences.

On type objects, ports are not connected, but serve as placeholders indicating that occurrences of the enclosing type object shall use a duplicate list of ports for connecting to ports on other object occurrences.

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcDistributionElementType IfcDistributionElementType 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ApplicableOccurrence [0:1] 6. HasPropertySets [1:?]      Types [0:1] 7. RepresentationMaps [1:?] 8. Tag [0:1]      ReferencedBy [0:?] 9. ElementType [0:1] IfcRelNests IfcRelNests 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] 5. RelatingObject [1:1] 6. RelatedObjects [1:?] IfcDistributionElementType:IsNestedBy1->IfcRelNests:RelatingObject0 IfcDistributionPort IfcDistributionPort 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ObjectType [0:1]      IsDeclaredBy [0:1]      Declares [0:?]      IsTypedBy [0:1]      IsDefinedBy [0:?] 6. ObjectPlacement [0:1] 7. Representation [0:1]      ReferencedBy [0:?]      PositionedRelativeTo [0:?]      ReferencedInStructures [0:?]      ContainedIn [0:1]      ConnectedFrom [0:1]      ConnectedTo [0:1] 8. FlowDirection [0:1] 9. PredefinedType [0:1] 10. SystemType [0:1] IfcRelNests:RelatedObjects1->IfcDistributionPort:IfcDistributionPort0 IfcLabel IfcLabel IfcDistributionPort:Name1->IfcLabel:IfcLabel0 IfcFlowDirectionEnum IfcFlowDirectionEnum IfcDistributionPort:FlowDirection1->IfcFlowDirectionEnum:IfcFlowDirectionEnum0 IfcDistributionSystemEnum IfcDistributionSystemEnum IfcDistributionPort:SystemType1->IfcDistributionSystemEnum:IfcDistributionSystemEnum0 IfcLocalPlacement IfcLocalPlacement 1. PlacementRelTo [0:1]      PlacesObject [0:?]      ReferencedByPlacements [0:?] 2. RelativePlacement [1:1] IfcDistributionPort:ObjectPlacement1->IfcLocalPlacement:IfcLocalPlacement0 IfcDistributionPortTypeEnum IfcDistributionPortTypeEnum IfcDistributionPort:PredefinedType1->IfcDistributionPortTypeEnum:IfcDistributionPortTypeEnum0 IfcAxis2Placement3D IfcAxis2Placement3D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. Axis [0:1] 3. RefDirection [0:1] IfcLocalPlacement:RelativePlacement1->IfcAxis2Placement3D:IfcAxis2Placement3D0 IfcCartesianPoint IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] IfcAxis2Placement3D:Location1->IfcCartesianPoint:IfcCartesianPoint0 IfcDirection_0 IfcDirection      LayerAssignment [0:1]      StyledByItem [0:1] 1. DirectionRatios [2:3] IfcAxis2Placement3D:Axis1->IfcDirection_0:IfcDirection0 IfcDirection_1 IfcDirection      LayerAssignment [0:1]      StyledByItem [0:1] 1. DirectionRatios [2:3] IfcAxis2Placement3D:RefDirection1->IfcDirection_1:IfcDirection0
Figure 4.4.4.7.A

General Usage

ApplicableEntity
IfcDistributionElementType
Table 4.4.4.7.B

Edit on Github


Is this page difficult to understand? Let us know!