IFC 4.3.2.20240128 (IFC4X3_ADD2) under development

4.1.5.1 Alignment Spatial Reference

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 table below shows a recommended list of general usage patterns that users may adopt.

G IfcAlignment IfcAlignment 1. GlobalId [1:1] 2. OwnerHistory [0:1] AlignmentName 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:?]      ContainedInStructure [0:1]      Positions [0:?] 8. PredefinedType [0:1] IfcRelReferencedInSpatialStructure IfcRelReferencedInSpatialStructure 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] 5. RelatedElements [1:?] RelatingStructure 6. RelatingStructure [1:1] IfcAlignment:ReferencedInStructures1->IfcRelReferencedInSpatialStructure:RelatedElements0 IfcLabel_0 IfcLabel IfcAlignment:Name1->IfcLabel_0:IfcLabel0 IfcSpatialElement IfcSpatialElement 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:?] 8. LongName [0:1]      ContainsElements [0:?]      ServicedBySystems [0:?] ReferencedElements      ReferencesElements [0:?]      IsInterferedByElements [0:?]      InterferesElements [0:?] IfcRelReferencedInSpatialStructure:RelatingStructure1->IfcSpatialElement:ReferencesElements0
Figure 4.1.5.1.A

General Usage

ApplicableEntity
IfcAlignment
Table 4.1.5.1.B

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